216.57.136.0/21
🇺🇸CIDR
216.57.136.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
Boston (Lower Allston)
RIR
ARIN
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 216.57.136.0/21 | AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC | No ROA | RADB | 5/31/2026 |
Covering Prefix
6 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 216.57.128.0/19 | AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC | No ROA | — | 5/31/2026 |
| 216.57.136.0/23 | AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC | No ROA | — | 5/31/2026 |
| 216.57.143.0/24 | AS33486ALKERMES - ALKERMES INCORPORATED | No ROA | — | 5/31/2026 |
| 216.57.140.0/24 | AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC | No ROA | — | 5/31/2026 |
| 216.57.141.0/24 | AS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC | No ROA | — | 5/31/2026 |
| 216.57.142.0/24 | AS395382CFN-AS - COMMONWEALTH EQUITY SERVICES, INC. | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS46887 | RADB | MAINT-AS27506 | 5/23/2025 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/216.57.136.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/216.57.136.0/21" | jq
External Links