166.204.0.0/17 - BGP Prefix (MOAS)
IPv4ARINannouncedMOAS RPKI Valid
CIDR
166.204.0.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇺🇸 United States
City
San Jose
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
2 of 2 routesMOAS - 2 origin ASNs
RPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 166.204.0.0/17 | AS7018 ATT-INTERNET4 - AT&T Enterprises, LLC | Valid | ARIN | 2026-10-11 |
| 166.204.0.0/17 | AS20057 ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC | Invalid | - | 2026-10-11 |
More-Specific Announcements
24 more-specific announcementsRPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 166.204.0.0/17 | AS7018 | /17 | arin |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS7018 | ARIN | MNT-AEL-360 | 2026-09-15 |
Transfer History
Registry transfers of 166.204.0.0/17, blocks inside it, or blocks containing it.
- 166.192.0.0/12Transfer ·
- 166.128.0.0/9M&A ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 166.192.0.0/12 | Transfer | |||
| 166.128.0.0/9 | M&A |
Origin ASNs (2)
AS7018MOAS
ATT-INTERNET4 - AT&T Enterprises, LLC
AS20057MOAS
ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC
Geolocation
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the ARIN regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/166.204.0.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/166.204.0.0/17" | jq
External Links