209.123.0.0/16
🇺🇸CIDR
209.123.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇺🇸 United States
City
Denver (Ballpark District)
RIR
ARIN
Status
allocated
Allocated
8/6/1997
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 209.123.0.0/16 | AS8001COLOGIX - Cologix, Inc | No ROA | RADB | 6/1/2026 |
Covering Prefix
11 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 209.123.190.0/23 | AS7868DATA-LIFE - Data Life Associates, Inc. | No ROA | — | 6/1/2026 |
| 209.123.35.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.53.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.55.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.73.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.81.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.121.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.151.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.78.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.4.0/24 | AS8001COLOGIX - Cologix, Inc | No ROA | — | 6/1/2026 |
| 209.123.250.0/24 | AS30138ARTECH-INFO - Artech Information Systems LLC | No ROA | — | 6/1/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS8001 | RADB | MAINT-AS8001 | 11/13/2023 |
Origin ASN
AS8001
COLOGIX - Cologix, Inc
Geolocation
API
Open https://api.ipctl.io/v1/prefix/209.123.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/209.123.0.0/16" | jq
External Links