166.221.0.0/16 - BGP Prefix
IPv4ARINallocated
CIDR
166.221.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Bellevue (Factoria)
RIR
ARIN
Status
allocated
Allocated
2025-04-07
Transfer History
Registry transfers of 166.221.0.0/16, blocks inside it, or blocks containing it.
- 166.221.0.0/16M&A ·
- 166.221.0.0/16Transfer ·
- 166.128.0.0/9M&A ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 166.221.0.0/16 | M&A | |||
| 166.221.0.0/16 | Transfer | |||
| 166.128.0.0/9 | M&A |
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/166.221.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/166.221.0.0/16" | jq
External Links