Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,001 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 160.250.30.0/23 | 512 | APNIC |  VN | 19th Nov 2024 |
| 160.250.32.0/23 | 512 | APNIC | VN | 19th Nov 2024 |
| 160.250.35.0/24 | 256 | APNIC |  ID | 25th Nov 2024 |
| 160.250.78.0/23 | 512 | APNIC | VN | 25th Nov 2024 |
| 160.250.90.0/23 | 512 | APNIC |  CN | 27th Nov 2024 |
| 160.30.111.0/24 | 256 | APNIC |  SG | 14th Aug 2024 |
| 160.30.170.0/23 | 512 | APNIC | VN | 20th Aug 2024 |
| 160.30.182.0/23 | 512 | APNIC |  NZ | 26th Aug 2024 |
| 160.30.194.0/23 | 512 | APNIC | CN | 27th Aug 2024 |
| 160.30.196.0/23 | 512 | APNIC | CN | 27th Aug 2024 |
| 160.30.198.0/23 | 512 | APNIC | CN | 27th Aug 2024 |
| 160.30.2.0/23 | 512 | APNIC |  PH | 21st Jul 2024 |
| 160.30.226.0/23 | 512 | APNIC |  MY | 30th Aug 2024 |
| 160.30.244.0/23 | 512 | APNIC |  IN | 3rd Sept 2024 |
| 160.30.254.0/23 | 512 | APNIC | VN | 5th Sept 2024 |
| 160.30.28.0/23 | 512 | APNIC | IN | 29th Jul 2024 |
| 160.30.40.0/23 | 512 | APNIC | CN | 30th Jul 2024 |
| 160.30.44.0/23 | 512 | APNIC | VN | 1st Aug 2024 |
| 160.30.66.0/23 | 512 | APNIC |  MM | 8th Aug 2024 |
| 160.30.7.0/24 | 256 | APNIC | IN | 22nd Jul 2024 |
| 160.30.76.0/23 | 512 | APNIC |  HK | 8th Aug 2024 |
| 160.30.88.0/23 | 512 | APNIC | VN | 9th Aug 2024 |
| 160.30.92.0/23 | 512 | APNIC | PH | 11th Aug 2024 |
| 160.35.0.0/16 | 65.5k | ARIN |  US | 21st Apr 1992 |
| 160.38.0.0/16 | 65.5k | RIPE NCC |  GB | 1st Sept 1993 |
| 160.41.0.0/16 | 65.5k | ARIN | US | 21st Apr 1992 |
| 160.44.128.0/18 | 16.4k | RIPE NCC |  DE | 23rd Apr 1992 |
| 160.47.0.0/16 | 65.5k | RIPE NCC | DE | 21st May 1992 |
| 160.49.0.0/16 | 65.5k | RIPE NCC | DE | 21st May 1992 |
| 160.5.0.0/17 | 32.8k | RIPE NCC |  SC | 5th Apr 2004 |
| 160.5.128.0/18 | 16.4k | RIPE NCC | SC | 5th Apr 2004 |
| 160.5.192.0/19 | 8.2k | RIPE NCC | SC | 5th Apr 2004 |
| 160.50.0.0/16 | 65.5k | RIPE NCC | DE | 21st May 1992 |
| 160.52.0.0/16 | 65.5k | RIPE NCC | DE | 21st May 1992 |
| 160.59.0.0/16 | 65.5k | RIPE NCC |  CH | 16th Jul 1992 |
| 160.64.0.0/16 | 65.5k | APNIC |  AU | 23rd Apr 1992 |
| 160.65.0.0/16 | 65.5k | ARIN | US | 23rd Apr 1992 |
| 160.66.0.0/16 | 65.5k | RIPE NCC |  IT | 1st Sept 1993 |
| 160.70.0.0/16 | 65.5k | RIPE NCC | DE | 5th Apr 2004 |
| 160.79.112.0/22 | 1k | ARIN | US | 20th Sept 2023 |
| 160.79.12.0/22 | 1k | ARIN | US | 4th Dec 2024 |
| 160.79.127.0/24 | 256 | ARIN | US | 19th Mar 2024 |
| 160.79.48.0/20 | 4.1k | ARIN | US | 11th Apr 2024 |
| 160.82.0.0/16 | 65.5k | ARIN | US | 28th Apr 1992 |
| 160.88.0.0/16 | 65.5k | ARIN | US | 29th Apr 1992 |
| 160.95.0.0/16 | 65.5k | ARIN | US | 4th May 1992 |
| 161.1.0.0/16 | 65.5k | ARIN | US | 20th Apr 1992 |
| 161.100.0.0/16 | 65.5k | ARIN | US | 23rd Jun 1992 |
| 161.101.0.0/16 | 65.5k | ARIN | US | 23rd Jun 1992 |
| 161.102.0.0/16 | 65.5k | ARIN | US | 23rd Jun 1992 |