166.181.0.0/16
🇺🇸CIDR
166.181.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Chicago
RIR
ARIN
Status
allocated
Allocated
4/7/2025
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 166.181.0.0/16 | AS6614USCC-ASN - T-Mobile USA, Inc. | No ROA | RADB | 5/30/2026 |
Covering Prefix
17 less-specific announcementsOrigin ASN
AS6614
USCC-ASN - T-Mobile USA, Inc.
Geolocation
API
Open https://api.ipctl.io/v1/prefix/166.181.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/166.181.0.0/16" | jq
External Links