166.203.0.0/16
🇺🇸CIDR
166.203.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
New York
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 166.203.0.0/16 | AS20057ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC | No ROA | — | 6/13/2026 |
Covering Prefix
23 less-specific announcementsGeolocation
API
Open https://api.ipctl.io/v1/prefix/166.203.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/166.203.0.0/16" | jq
External Links