208.121.128.0/17
🇺🇸IPv4ARINannouncedAS39961CCSF - San Francisco Department of Telecommunications and Information ServicesNo ROA
CIDR
208.121.128.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇺🇸 United States
City
San Francisco (Mission San Rafael)
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 208.121.128.0/17 | AS39961CCSF - San Francisco Department of Telecommunications and Information Services | No ROA | — | 6/1/2026 |
Covering Prefix
4 less-specific announcementsGeolocation
Country🇺🇸United StatesUS
RegionCalifornia
CitySan Francisco (Mission San Rafael)
Coordinates37.7644, -122.4180 ↗
API
Open https://api.ipctl.io/v1/prefix/208.121.128.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/208.121.128.0/17" | jq
External Links