AS12156 City of Aurora Colorado

AURORA-COLORADO - City of Aurora Colorado · registered in the United States

IPv4 addresses1,5365 prefixes · <0.001% of announced IPv4

Rank in United States#6,946largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#26,457of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS12156 in ASN lookup Look up an IP in this network (192.78.99.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

192.78.99.0/24
198.148.209.0/24
198.199.187.0/24
198.199.188.0/24
205.167.144.0/23

Similar-sized networks in United States

ASNNameIPv4 addresses

AS11862#6943 GSIC-NV - Radial, Inc.1,536

AS11892#6944 PEARSON-NA - NCS Pearson Inc.1,536

AS11928#6945 HBGUSA - Hachette Book Group, Inc.1,536

AS12239#6947 BLOOMINGTON-SD87 - Bloomington Public School District No. 871,536

AS13453#6948 DSRGLOBAL-COM - DIVERSIFIED SYSTEMS RESOURCES, LTD1,536

AS13481#6949 AMS-AGD-PR - HEWLETT PACKARD ENTERPRISE COMPANY1,536

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources