16.5.72.0/21 - GTT BACKBONE GTT Communications (AS3257)
CIDR
16.5.72.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Germantown
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 16.5.72.0/21 | AS3257 GTT-BACKBONE GTT Communications Inc. | Valid | ARINOther IRR | 2026-10-11 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 16.5.72.0/21 | AS3257 | /24 | arin |
Transfer History
Registry transfers of 16.5.72.0/21, blocks inside it, or blocks containing it.
- 16.0.0.0/8M&A ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 16.0.0.0/8 | M&A |
Related Prefixes
Geolocation
Abuse Contact
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/16.5.72.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/16.5.72.0/21" | jq
External Links