204.9.128.0/21
🇺🇸CIDR
204.9.128.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Ashburn
RIR
ARIN
Status
allocated
Allocated
10/11/2004
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not currently announced in BGP. See covering prefix below. | ||||
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 204.9.128.0/24 | AS77JHUAPL-AS - Johns Hopkins University Applied Physics Laboratory | Valid | — | 6/1/2026 |
| 204.9.130.0/24 | AS77JHUAPL-AS - Johns Hopkins University Applied Physics Laboratory | Valid | — | 6/1/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/204.9.128.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/204.9.128.0/21" | jq
External Links