AS5538 Institute of Mathematics and Computer Science of University of Latvia

Latvia SigmaNet-NIC RIPE 5 IPv4 prefixes 2 IPv6 prefixes

IPv4 addresses

27,904

IPv6 /48 networks

524,288

RPKI

7 valid0 no ROA

Peers and downstreams

Holder

AS name: SigmaNet-NIC
Description: Institute of Mathematics and Computer Science of University of Latvia
Organisation: Institute of Mathematics and Computer Science of University of Latvia
Registered in: Riga, Latvia
Abuse contact: abuse@sigmanet.lv
Assigned: 1996-02-04
Registered: 2002-08-22
Record last changed: 2026-07-29 07:03 UTC

185.23.160.0/22 194.8.1.0/24 5.152.224.0/21 85.254.192.0/18 92.240.64.0/19

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 90/100

pass	Prefixes covered by valid ROAs 7 of 7 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 2 IPv6 prefixes.	15/15
pass	More than one upstream 6 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@sigmanet.lv 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
pass	Registry record maintained Last changed 2026-07-29.	5/5

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

Show this on your website

HTML

<a href="https://ip-fd.net/asn/5538"><img src="https://ip-fd.net/badge/asn/5538/health.svg" alt="AS5538 network health on IP-FD.net"></a>

Markdown

[![AS5538 network health](https://ip-fd.net/badge/asn/5538/health.svg)](https://ip-fd.net/asn/5538)

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

Routing changes

Last 30 days

2026-10-04 23:15 UTC	New neighbour	AS12578	peer
2026-10-04 23:15 UTC	Relationship changed	AS1257	upstream to peer

WHOIS

aut-num:        AS5538
as-name:        SigmaNet-NIC
remarks:        
remarks:        Riga, Latvia
org:            ORG-IOMA1-RIPE
remarks:        
remarks:        SigmaNet,NIC DIRECT PEERS,IX
remarks:        
remarks:        SigmaNet via GEANT, ACAD-NET
remarks:        
remarks:        SigmaNet, NIC upstreams
remarks:        
admin-c:        LSaS2-RIPE
tech-c:         LSaS2-RIPE
remarks:        
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         LUMII-MNT
created:        2002-08-22T14:00:42Z
last-modified:  2026-07-29T07:03:19Z
source:         RIPE
% 18 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/5538

const res = await fetch('https://ip-fd.net/api/v1/asn/5538', {
  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/5538', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/5538');
curl_setopt($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/5538", 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.

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AS21320	GEANT Vereniging GEANT_IAS_VRF
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AS8605	University of Latvia LANET
AS8674	Netnod AB NETNOD-IX
AS10906	Nucleo de Inf. e Coord. do Ponto BR - NIC.BR AS10906
AS25152	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) K-ROOT-SERVER
AS29067	LLC "Hostmaster" UATLD-AS
AS29345	Institute of Mathematics and Computer Science of University of Latvia LUMII
AS34073	LR Izglitibas un zinatnes ministrija ACAD-NET
AS42909	Community DNS Limited COMMUNITYDNS
AS44358	Domreg-Any DOMREG-ANY-AS
AS51955	Institute of Mathematics and Computer Science of University of Latvia NIC-LV-ANYCAST-AS
AS199029	World Registry of Internet Domains LTD World-Registry-of-Internet-Domains-AS
AS199031	SIA Amberbit AmberBit

AS1257	Tele2 Sverige AB SWIPNET
AS12578	SIA Tet APOLLO-AS
AS28917	Fiord Networks, UAB Fiord-AS