AS5408 National Infrastructures for Research and Technology S.A.

Greece GR-NET RIPE 29 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

245,248

IPv6 /48 networks

524,288

RPKI

24 valid6 no ROA

Peers and downstreams

Holder

AS name: GR-NET
Description: http://www.grnet.gr
Organisation: National Infrastructures for Research and Technology S.A.
Registered in: Athens, Greece
Abuse contact: abuse@grnet.gr
Assigned: 1995-09-05
Registered: 1970-01-01
Record last changed: 2021-12-31 11:31 UTC

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 75/100

partly	Prefixes covered by valid ROAs 24 of 30 announced prefixes are RPKI valid, 6 have no ROA.	20/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
partly	More than one upstream 1 upstream seen in BGP.	5/10
pass	Working abuse contact abuse@grnet.gr is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
fail	Registry record maintained Last changed 2021-12-31.	0/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

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HTML

<a href="https://ip-fd.net/asn/5408"><img src="https://ip-fd.net/badge/asn/5408/health.svg" alt="AS5408 network health on IP-FD.net"></a>

Markdown

[![AS5408 network health](https://ip-fd.net/badge/asn/5408/health.svg)](https://ip-fd.net/asn/5408)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-04 14:44 UTC	Relationship changed	AS8280	upstream to peer
2026-10-04 14:44 UTC	Relationship changed	AS3491	upstream to peer
2026-10-04 14:44 UTC	Relationship changed	AS20965	upstream to peer
2026-10-04 14:44 UTC	Relationship changed	AS13335	upstream to peer

WHOIS

aut-num:        AS5408
as-name:        GR-NET
descr:          http://www.grnet.gr
org:            ORG-GRaT1-RIPE
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        General Info
remarks:        ==============
remarks:        GRNET donwstream customers are Greek Universities, Academic
remarks:        and Research Institutes
remarks:        GRNET has GEANT as its upstream; it also connects to GRIX
remarks:        Internet Exchange
remarks:        
remarks:        RPKI in GRNET
remarks:        ==============
remarks:        GRNET ***drops*** ALL RPKI invalid prefixes received from Upstream
remarks:        and Greek Internet Exchange (GR-IX)
remarks:        
remarks:        PA Space Aggregation
remarks:        =============
remarks:        GRNET aggregates its PA space before announcing it to its
remarks:        upstream(s) and exchanges. Should a customer with PA space
remarks:        wishes not to have its prefixes aggregated, a special community
remarks:        should be used to tag this route (see below).
remarks:        Prefixes from GRNET allocation that announced from public ASs
remarks:        are announced deaggregated.\
remarks:        Prefix lengths longer than /24 for IPv4 and /48 for IPv6 are NOT
remarks:        announced to Upstream or GRIX
remarks:        
remarks:        Primary/Backup control
remarks:        ========================
remarks:        GRNET respects the MED received by its customers; thus, the
remarks:        customers can indicate their primary/backup line and control
remarks:        incoming traffic by setting MED appropriatelly. Also, the
remarks:        customers may use the community 5408:110 to indicate their
remarks:        backup connection (lower local pref), but this method is
remarks:        recommended only for customers multihomed to another Greek ISP
remarks:        that use their connection with GRNET as backup.
remarks:        
remarks:        Hot Potato routing
remarks:        ========================
remarks:        By setting the same attributes (Local Preference and MED) on
remarks:        advertising prefixes, a customer with more than one connections
remarks:        with GRNET has the ability to use all active paths.
remarks:        By this way, "hot potato" routing is achieved. Traffic will exit
remarks:        GRNETs network choosing the closest to destination border router.
remarks:        
remarks:        Anycast
remarks:        ========================
remarks:        GRNET does not follow any explicit policy for anycast services.
remarks:        Normal routing (and, thus, preference) applies to all anycast
remarks:        routes
remarks:        
remarks:        BGP Communities used in GRNET:
remarks:        ================================
remarks:        
remarks:        Informational Communities:
remarks:        +---------------------------------------------------------------+
remarks:        | These communities tag the source of the routes. They can ONLY |
remarks:        | be appended by GRNET. Routes with this tag received by any |
remarks:        | peer will be rejected! |
remarks:        +---------------------------------------------------------------+
remarks:        5408:1001 Routes received from GEANT
remarks:        5408:1002 Routes received from GRIX
remarks:        5408:1003 Routes from GRNET (Customers & BackBone)
remarks:        5408:1004 Routes from GEANT NREN
remarks:        5408:1005 Routes from GEANT IAS
remarks:        5408:1006 Routes from GEANT CLS
remarks:        
remarks:        Special Communities for route manipulation:
remarks:        +---------------------------------------------------------------+
remarks:        | These communities tag the source of the routes. They can ONLY |
remarks:        | be appended by GRNET. Routes with this tag received by any |
remarks:        | peer will be rejected! |
remarks:        +---------------------------------------------------------------+
remarks:        5408:2000 Do not aggregate
remarks:        5408:2005 Prepend AS5408 x5
remarks:        5408:4001 Do not announce to GRIX
remarks:        5408:4005 Do not announce to GEANT
remarks:        5408:4006 Do not announce to GEANT NREN VRF
remarks:        5408:4007 Do not announce to GEANT Tier-1
remarks:        
remarks:        Routing Manipulation (for GRNET customers only):
remarks:        +---------------------------------------------------------------+
remarks:        | This set of tools allow GRNET clients to manipulate their |
remarks:        | routing: |
remarks:        
remarks:        LOCAL PREFERENCES IN GRNET:
remarks:        =============================
remarks:        
remarks:        LocalPref 200: - GRNET Customers
remarks:        - Special Customers (KROOT, SYZEYXIS, ...)
remarks:        - Locally Generated GRNET Aggregates
remarks:        
remarks:        LocalPref 190: - GRNET Customers, backup connection
remarks:        
remarks:        LocalPref 180: - GEANT NREN VRF
remarks:        
remarks:        LocalPref 170: - GRIX routes (MED=0 Primary, MED=20 Secondary)
remarks:        
remarks:        LocalPref 160: - GEANT CLS VRF
remarks:        
remarks:        LocalPref 150: - GRNET as backup in dual homed customers
remarks:        
remarks:        LocalPref 140: - GEANT IAS VRF
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        =======================================================================
remarks:        iBGP (AS5408)
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        Full-mesh iBGP peerings.
remarks:        Import Policy: Accept ANY
remarks:        Export Policy: Advertize (a) all routes (FIRT) or (b) GRNET & GRIX
remarks:        routes only, depending on router capabilities.
remarks:        ======================================================================
remarks:        =======================================================================
remarks:        GEANT (AS20965)
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        GEANT is the Internet Upstream for GRNET
remarks:        Import Policy: Accept all routes (apart from martians),
remarks:        set MED appropratelly on primary & backup peering.
remarks:        Export Policy: Announce all GRNET routes (tagged with 5408:1003)
remarks:        that are not tagged with 5408:4005 (don't-announce-to-geant).
remarks:        Aggregate PA space (except from the routes tagged with
remarks:        5408:2000 (do not aggregate) community.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        GRIX Peers
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        These are the GRIX Peers of GRNET
remarks:        Import Policy: Reject routes tagged with special communities
remarks:        Accept all other routes that
remarks:        (a) have the appropriate AS path and
remarks:        (b) originate from the peer (or behind it)
remarks:        For these, and according to the received communities:
remarks:        (i) Set the appropriate local preference
remarks:        Export Policy: Announce all GRNET routes (tagged with 5408:1003)
remarks:        that are not tagged with 5408:4001 (don't-announce-to-grix).
remarks:        Aggregate PA space (except from the routes tagged with
remarks:        5408:2000 (do not aggregate) community.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        GRIX RS
remarks:        ----------------------------------------------------------------------
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        GRIX ROUTER @ GRIX
remarks:        ----------------------------------------------------------------------
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        K-ROOT mirror @ GRIX
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        K-ROOT @ GRIX. Accept K-Root routes, announce within GRNET *only*
remarks:        Announce default route.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        GRNET Clients
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        These are the normal GRNET clients (Universities, Research orgs, etc)
remarks:        Import Policy: Reject routes tagged with special communities
remarks:        Accept all other routes that
remarks:        (a) have the appropriate AS path and
remarks:        (b) originate from the client (or behind it)
remarks:        For these, and according to the received communities:
remarks:        (i) Set the appropriate local preference
remarks:        Prefixes with no corresponding exact matching route on the
remarks:        RIPE whois database are only accepted if tagged with NO_EXPORT
remarks:        Local Preference (on backup links) can be lowered by
remarks:        using the appropriate community (5408:110), but MED is
remarks:        recommended for this purpose.
remarks:        Export Policy:
remarks:        (a) either all routes (FIRT)
remarks:        (b) or a partial routing table, consiting
remarks:        GRNET (5408:1003) and GRIX (5408:1002) routes
remarks:        (c) or a partial routing table, consiting
remarks:        GRNET (5408:1003) and GRIX (5408:1002) routes plus default route 0/0.
remarks:        (d) or default route 0/0.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        EU ACADEMIC INTERNET (GRNET + OTHER EU NRENS)
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION: announce GRNET and GEANT NREN (community 20965:155), route within GRNET *only*.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        GRNET SERVICES
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        do not announce anything, accept AS65500
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        GRNET ECI-ECN
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        do not announce anything, accept AS65502
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        SYZEYXIS
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        announce only GRNET routes, route within GRNET *only*.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        AKAMAI
remarks:        ----------------------------------------------------------------------
remarks:        PEER DESCRIPTION:
remarks:        AKAMAI. Accept no routes. Announce GRNET customers.
remarks:        =======================================================================
remarks:        =======================================================================
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
status:         ASSIGNED
admin-c:        GN1931-RIPE
tech-c:         GN1931-RIPE
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         GRNET-NOC
created:        1970-01-01T00:00:00Z
last-modified:  2021-12-31T11:31:18Z
source:         RIPE
% 42 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/5408

const res = await fetch('https://ip-fd.net/api/v1/asn/5408', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/5408', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/5408');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/5408", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

AS2546	National Center of Scientific Research DEMOKRITOS ARIADNE-T
AS3323	National Technical University of Athens NTUA
AS5470	Aristotle University of Thessaloniki ASAUTHNET
AS5489	International Hellenic University TEI-THES
AS6744	Computer Technology Institute and Press "Diophantus" RACTI-NET
AS6867	University of Crete UCnet
AS8248	Computer Technology Institute and Press "Diophantus" GR-EDUNET
AS8253	Democritus University of Thrace DUTHNET-AS
AS8278	Technical University of Crete TUC-AS
AS8522	Foundation of Research and Technology Hellas FORTH-AS
AS8581	University Of Ioannina UOI
AS8611	University of Economics and Business Athens
AS8617	of the Aegean University
AS8618	University Ionion
AS8643	NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS ATHENAnet
AS8762	Hellenic Mediterranean University TEI-OF-CRETE-AS
AS8991	Hellenic Centre for Marine Research HCMR-NET
AS9069	Uniwa UNIWA
AS12364	University of Macedonia, Economic and Social Sciences UOM
AS12402	University of Piraeus UOPIRAEUS
AS15536	European Centre for the Development of Vocational Training (CEDEFOP) CEDEFOP-AS
AS15690	NATIONAL OBSERVATORY OF ATHENS NOANET
AS15948	fundamental and technological research ICE/HT
AS20813	Hellenic Open University HOU-AS
AS31563	Hellenic National Meteorological Service HNMS-AS
AS47065	USC / UFMG PEERING Research Testbed PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065
AS47616	Center for Research and Technology Hellas (CERTH) CERTH
AS50148	Elliniki Radiofonia Tileorasi (ERT) SA ERT
AS202640	KENTRO POLITISMOU IDRYMA STAVROS NIARCHOS MONOPROSOPI A.E. snfcc
AS203348	Hellenic Telecommunications and Post Commision EETT-AS

AS2546	National Center of Scientific Research DEMOKRITOS ARIADNE-T
AS3323	National Technical University of Athens NTUA
AS3491	PCCW Global (HK) Ltd. PCCWG-APAC-HK
AS5470	Aristotle University of Thessaloniki ASAUTHNET
AS5489	International Hellenic University TEI-THES
AS6744	Computer Technology Institute and Press "Diophantus" RACTI-NET
AS6867	University of Crete UCnet
AS8248	Computer Technology Institute and Press "Diophantus" GR-EDUNET
AS8253	Democritus University of Thrace DUTHNET-AS
AS8278	Technical University of Crete TUC-AS
AS8280	SYNAPSECOM S.A. Provider of Telecommunications and Internet Services SYNAPSECOM-AS
AS8522	Foundation of Research and Technology Hellas FORTH-AS
AS8581	University Of Ioannina UOI
AS8611	University of Economics and Business Athens
AS8617	of the Aegean University
AS8618	University Ionion
AS8643	NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS ATHENAnet
AS8762	Hellenic Mediterranean University TEI-OF-CRETE-AS
AS8991	Hellenic Centre for Marine Research HCMR-NET
AS9069	Uniwa UNIWA
AS12364	University of Macedonia, Economic and Social Sciences UOM
AS12402	University of Piraeus UOPIRAEUS
AS13335	Cloudflare, Inc. CLOUDFLARENET
AS15536	European Centre for the Development of Vocational Training (CEDEFOP) CEDEFOP-AS
AS15690	NATIONAL OBSERVATORY OF ATHENS NOANET
AS15948	fundamental and technological research ICE/HT
AS20813	Hellenic Open University HOU-AS
AS20965	GEANT Vereniging GEANT
AS31563	Hellenic National Meteorological Service HNMS-AS
AS47065	USC / UFMG PEERING Research Testbed PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065
AS47616	Center for Research and Technology Hellas (CERTH) CERTH
AS50148	Elliniki Radiofonia Tileorasi (ERT) SA ERT
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS56457	FASTPATH IKE FASTPATH
AS197580	Connecticore Telecommunications Information Technology S.A AS-CONNECTICORE
AS202640	KENTRO POLITISMOU IDRYMA STAVROS NIARCHOS MONOPROSOPI A.E. snfcc
AS203348	Hellenic Telecommunications and Post Commision EETT-AS