198.251.16.0/21
🇺🇸CIDR
198.251.16.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇺🇸 United States
City
New York
RIR
ARIN
Status
allocated
Allocated
8/30/1993
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not currently announced in BGP. See covering prefix below. | ||||
Covering Prefix
7 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 198.251.18.0/23 | AS36319ENWHC - NorthShore University HealthSystem | No ROA | — | 6/1/2026 |
| 198.251.16.0/23 | AS36319ENWHC - NorthShore University HealthSystem | No ROA | — | 6/1/2026 |
| 198.251.23.0/24 | AS26912NCH-AS1 - Northwest Community Hospital | No ROA | — | 6/1/2026 |
| 198.251.17.0/24 | AS36319ENWHC - NorthShore University HealthSystem | No ROA | — | 6/1/2026 |
| 198.251.18.0/24 | AS36319ENWHC - NorthShore University HealthSystem | No ROA | — | 6/1/2026 |
| 198.251.19.0/24 | AS36319ENWHC - NorthShore University HealthSystem | No ROA | — | 6/1/2026 |
| 198.251.16.0/24 | AS36319ENWHC - NorthShore University HealthSystem | No ROA | — | 6/1/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS26912 | RADB | MAINT-AS7922 | 11/13/2023 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/198.251.16.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/198.251.16.0/21" | jq
External Links