Autonomous system profile

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

AS12156

Announcement observedARIN

City of Aurora Colorado · AURORA-COLORADO

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

Last active9/30/2026, 06:12:44Snapshot expired

View network topology RDAP registration

ASN: AS12156
Registration country: United States
Name: City of Aurora Colorado
Abbreviation: AURORA-COLORADO
Registration date: 1/24/2018, 18:13:47
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
192.78.99.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	9/30/2026, 00:00:00	✓	×	Historical record
198.148.209.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	9/30/2026, 00:00:00	✓	×	Historical record
198.199.187.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	9/30/2026, 00:00:00	✓	×	Historical record
198.199.188.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	9/30/2026, 00:00:00	✓	×	Historical record
205.167.144.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	9/30/2026, 00:00:00	✓	×	Historical record
205.167.144.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 00:00:00	9/30/2026, 00:00:00	✓	×	Historical record

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

Registration and sources

Organization: City of Aurora Colorado
RIR: ARIN
Registration country: United States
Registration date: 1/24/2018, 18:13:47
Abuse contact: smnewman@auroragov.org

Snapshot trend

9/30/2026, 06:12:446 v40 v63 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