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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 160.213.208.0/21 | 2k | RIPE NCC |  CH | 1st Sept 1993 |
| 160.213.40.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.48.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.64.0/20 | 4.1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.80.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.88.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.215.0.0/16 | 65.5k | APNIC |  JP | 16th Mar 2012 |
| 160.22.10.0/23 | 512 | APNIC |  ID | 28th May 2024 |
| 160.22.110.0/23 | 512 | APNIC |  IN | 10th Jun 2024 |
| 160.22.114.0/23 | 512 | APNIC | IN | 10th Jun 2024 |
| 160.22.139.0/24 | 256 | APNIC |  PH | 13th Jun 2024 |
| 160.22.145.0/24 | 256 | APNIC |  AU | 13th Jun 2024 |
| 160.22.148.0/23 | 512 | APNIC |  CN | 14th Jun 2024 |
| 160.22.166.0/23 | 512 | APNIC | IN | 17th Jun 2024 |
| 160.22.184.0/23 | 512 | APNIC |  HK | 19th Jun 2024 |
| 160.22.216.0/24 | 256 | APNIC |  MY | 24th Jun 2024 |
| 160.22.224.0/23 | 512 | APNIC | CN | 20th Jun 2024 |
| 160.22.230.0/23 | 512 | APNIC | CN | 24th Jun 2024 |
| 160.22.244.0/23 | 512 | APNIC | CN | 25th Jun 2024 |
| 160.22.246.0/23 | 512 | APNIC | CN | 25th Jun 2024 |
| 160.22.4.0/23 | 512 | APNIC | ID | 27th May 2024 |
| 160.22.45.0/24 | 256 | APNIC | ID | 5th Jun 2024 |
| 160.22.48.0/23 | 512 | APNIC | HK | 4th Jun 2024 |
| 160.22.54.0/23 | 512 | APNIC |  VN | 4th Jun 2024 |
| 160.22.58.0/23 | 512 | APNIC | CN | 5th Jun 2024 |
| 160.22.82.0/23 | 512 | APNIC | CN | 6th Jun 2024 |
| 160.22.88.0/23 | 512 | APNIC |  US | 6th Jun 2024 |
| 160.22.98.0/23 | 512 | APNIC | ID | 7th Jun 2024 |
| 160.222.112.0/20 | 4.1k | APNIC | AU | 18th Jun 1992 |
| 160.222.128.0/20 | 4.1k | APNIC | AU | 18th Jun 1992 |
| 160.222.144.0/22 | 1k | APNIC | AU | 18th Jun 1992 |
| 160.222.148.0/22 | 1k | APNIC | AU | 18th Jun 1992 |
| 160.222.160.0/21 | 2k | APNIC | AU | 18th Jun 1992 |
| 160.222.168.0/21 | 2k | APNIC | AU | 18th Jun 1992 |
| 160.222.176.0/20 | 4.1k | APNIC | AU | 18th Jun 1992 |
| 160.222.196.0/22 | 1k | APNIC | AU | 18th Jun 1992 |
| 160.222.200.0/21 | 2k | APNIC | AU | 18th Jun 1992 |
| 160.222.208.0/20 | 4.1k | APNIC | AU | 18th Jun 1992 |
| 160.222.224.0/19 | 8.2k | APNIC | AU | 18th Jun 1992 |
| 160.222.64.0/19 | 8.2k | APNIC | AU | 18th Jun 1992 |
| 160.222.96.0/20 | 4.1k | APNIC | AU | 18th Jun 1992 |
| 160.223.202.0/24 | 256 | RIPE NCC |  FR | 9th May 1995 |
| 160.226.184.0/22 | 1k | AFRINIC |  BF | 10th Jul 2017 |
| 160.228.0.0/16 | 65.5k | RIPE NCC | FR | 5th Apr 2004 |
| 160.229.0.0/16 | 65.5k | ARIN | US | 22nd Jun 1992 |
| 160.236.100.0/23 | 512 | APNIC | HK | 13th Jul 2026 |
| 160.236.102.0/23 | 512 | APNIC |  PK | 14th Jul 2026 |
| 160.236.104.0/23 | 512 | APNIC | IN | 15th Jul 2026 |
| 160.236.106.0/24 | 256 | APNIC | ID | 16th Jul 2026 |
| 160.236.108.0/24 | 256 | APNIC | AU | 17th Jul 2026 |