154.38.4.0/22
🇬🇧CIDR
154.38.4.0/22
IP Version
IPv4
Addresses
1K
Mask
/22 (255.255.252.0)
Country
🇬🇧 United Kingdom
City
LONDON
RIR
ARIN
Status
announced
Allocated
-
AS0 discard ROA — upstream RPKI inconsistency
The only ROA covering this prefix names AS0, which means the issuing RIR has published the prefix as “not routable by any AS” (RFC 6483). If the RIR’s allocation records still point to a live operator, the ROA and the RDAP registration disagree — this is an upstream inconsistency in the issuing RIR’s own publications, not necessarily a hijack.
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 154.38.4.0/22 | AS5650FRONTIER-FRTR - Frontier Communications of America, Inc. | Invalid | — | 5/31/2026 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 154.36.0.0/14 | AS174COGENT-174 - Cogent Communications, LLC | No ROA | — | 5/31/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 154.38.4.0/22 | AS0 | /22 | arin |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/154.38.4.0/22Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/154.38.4.0/22" | jq
External Links