Autonomous system profile

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

AS391

Announcement observedARIN

Air Force Systems Networking · AFCONC-BLOCK1-AS

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

Last active9/29/2026, 06:35:59Snapshot expired

View network topology RDAP registration

ASN: AS391
Registration country: United States
Name: Air Force Systems Networking
Abbreviation: AFCONC-BLOCK1-AS
Registration date: 8/4/1989, 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
128.202.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
128.236.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.105.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.15.116.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/15/2026, 08:00:00	✓	×	Historical record
131.15.119.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/21/2026, 16:00:00	✓	×	Historical record
131.15.120.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.136.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.144.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.16.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/15/2026, 08:00:00	✓	×	Historical record
131.15.160.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.208.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.233.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.234.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.235.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.236.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.237.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.238.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.239.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.252.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.253.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.32.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/15/2026, 08:00:00	✓	×	Historical record
131.15.38.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.40.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.48.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.64.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.80.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.88.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.90.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.92.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.15.98.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	9/29/2026, 00:00:00	✓	×	Historical record
131.18.1.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.18.128.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.120.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.121.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.247.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.248.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.249.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.251.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.255.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.32.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.4.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.44.64.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.60.220.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.60.240.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.61.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.61.211.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.62.110.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.62.112.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record
131.62.120.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/24/2026, 00:00:00	9/24/2026, 00:00:00	✓	×	Historical record

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

Registration and sources

Organization: Air Force Systems Networking
RIR: ARIN
Registration country: United States
Registration date: 8/4/1989, 04:00:00
Abuse contact: disa.columbus.ns.mbx.arin-registrations@mail.mil

Snapshot trend

9/29/2026, 06:35:59148 v40 v61 Upstream · 0 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