Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS3557

Announcement observedARIN

Internet Systems Consortium, Inc. · ISC-AS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/20/2026, 19:35:39Snapshot expired

View network topology RDAP registration

ASN: AS3557
Registration country: United States
Name: Internet Systems Consortium, Inc.
Abbreviation: ISC-AS
Registration date: 4/21/1994, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
192.5.4.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/20/2026, 08:00:00	✓	×	Currently valid
192.5.5.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/20/2026, 08:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Internet Systems Consortium, Inc.
RIR: ARIN
Registration country: United States
Registration date: 4/21/1994, 04:00:00
Abuse contact: abuse@isc.org

Snapshot trend

10/20/2026, 19:35:392 v42 v623 Upstream · 2 Uncertain

10/8/2026, 09:04:082 v42 v622 Upstream · 2 Uncertain

9/29/2026, 10:35:222 v42 v623 Upstream · 2 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn