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AS400555 Isogram, LLC

United States ISOGRAM ARIN 2 IPv4 prefixes 1 IPv6 prefix
IPv4 addresses
512
IPv6 /48 networks
65,536
RPKI
0 valid3 no ROA
Peers and downstreams
3

Holder

AS name
ISOGRAM
Description
Isogram, LLC - Primary (Production) AS
Organisation
Isogram, LLC
Abuse contact
Not published
Assigned
2022-03-21
Registered
2022-03-22
Record last changed
2026-04-09 20:06 UTC

Upstream graph

Upstreams and their upstreams, from BGP paths
AS6939 Hurricane Electric LLC AS6939 · US Hurricane Electric LLC AS400555 Isogram, LLC AS400555 · US Isogram, LLC

Network health

Grade D · 45/100
fail Prefixes covered by valid ROAs
0 of 3 announced prefixes are RPKI valid, 3 have no ROA.		 0/25
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
fail Working abuse contact
No abuse contact is published in the registry.		 0/15
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 2026-04-09.		 5/5
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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AS400555 health AS400555 RPKI
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Routing changes

Last 30 days
2026-10-04 11:45 UTCRelationship changed AS58057 upstream to peer
2026-10-04 11:45 UTCRelationship changed AS398447 upstream to peer

WHOIS

aut-num:        AS400555
as-name:        ISOGRAM
handle:         AS400555
registrant:     ISOGR (Isogram Inc.)
routing,noc:    NOC33427-ARIN (NOC) <noc@isogram.com>
dns,technical,administrative,abuse:NETEN32-ARIN (NETENG) <neteng@isogram.com>
last changed:   2026-04-09T16:06:36-04:00
registration:   2022-03-22T14:48:59-04:00
source:         ARIN (RDAP)