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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 195.96.135.0/24 | 256 | RIPE NCC |  AU | 2nd Nov 2021 |
| 195.96.140.0/24 | 256 | RIPE NCC |  LU | 2nd Nov 2021 |
| 195.96.148.0/24 | 256 | RIPE NCC |  SC | 2nd Nov 2021 |
| 195.96.153.0/24 | 256 | RIPE NCC |  IR | 2nd Nov 2021 |
| 195.96.32.0/21 | 2k | RIPE NCC |  DE | 28th May 1997 |
| 195.96.40.0/21 | 2k | RIPE NCC |  RU | 28th May 1997 |
| 195.96.48.0/20 | 4.1k | RIPE NCC | DE | 28th May 1997 |
| 195.96.96.0/19 | 8.2k | RIPE NCC |  NL | 12th Mar 1997 |
| 196.1.101.0/24 | 256 | AFRINIC |  ZA | 21st Jul 2012 |
| 196.1.102.0/24 | 256 | AFRINIC | ZA | 21st Jul 2012 |
| 196.1.112.0/24 | 256 | LACNIC |  CU | 26th Jul 1994 |
| 196.1.118.0/24 | 256 | AFRINIC |  GH | 26th Aug 1994 |
| 196.1.119.0/24 | 256 | AFRINIC |  CI | 28th Feb 2020 |
| 196.1.12.0/23 | 512 | AFRINIC | ZA | 4th Aug 1993 |
| 196.1.128.0/24 | 256 | AFRINIC | ZA | 11th May 1993 |
| 196.1.129.0/24 | 256 | AFRINIC | ZA | 11th May 1993 |
| 196.1.133.0/24 | 256 | AFRINIC |  NG | 9th Sept 2010 |
| 196.1.135.0/24 | 256 | LACNIC | CU | 19th Jul 1994 |
| 196.1.136.0/24 | 256 | ARIN |  JM | 24th Aug 1994 |
| 196.1.14.0/24 | 256 | AFRINIC | ZA | 4th Aug 1993 |
| 196.1.140.0/24 | 256 | ARIN |  US | 13th Dec 1994 |
| 196.1.141.0/24 | 256 | ARIN |  PR | 17th Jan 1995 |
| 196.1.142.0/24 | 256 | ARIN | US | 31st Mar 1995 |
| 196.1.24.0/23 | 512 | AFRINIC | ZA | 2nd Nov 1993 |
| 196.1.3.0/24 | 256 | RIPE NCC |  SA | 21st Dec 1992 |
| 196.1.48.0/22 | 1k | AFRINIC | ZA | 23rd Aug 1993 |
| 196.1.5.0/24 | 256 | RIPE NCC | RU | 27th Mar 1993 |
| 196.1.6.0/24 | 256 | RIPE NCC | SA | 28th Feb 1994 |
| 196.1.64.0/22 | 1k | RIPE NCC | SA | 30th Dec 1992 |
| 196.1.7.0/24 | 256 | AFRINIC |  MU | 6th Apr 1994 |
| 196.1.82.0/23 | 512 | AFRINIC | ZA | 4th Aug 1993 |
| 196.1.84.0/23 | 512 | AFRINIC | ZA | 4th Aug 1993 |
| 196.1.86.0/24 | 256 | AFRINIC | ZA | 4th Aug 1993 |
| 196.1.87.0/24 | 256 | AFRINIC | ZA | 2nd Nov 1993 |
| 196.1.88.0/22 | 1k | AFRINIC | ZA | 2nd Nov 1993 |
| 196.10.0.0/24 | 256 | AFRINIC | CI | 28th Feb 2020 |
| 196.10.102.0/23 | 512 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.105.0/24 | 256 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.106.0/23 | 512 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.108.0/22 | 1k | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.128.0/23 | 512 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.136.0/24 | 256 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.137.0/24 | 256 | AFRINIC | CI | 28th Feb 2020 |
| 196.10.141.0/24 | 256 | AFRINIC | ZA | 16th Jul 2014 |
| 196.10.142.0/23 | 512 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.144.0/23 | 512 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.146.0/24 | 256 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.149.0/24 | 256 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.200.0/24 | 256 | AFRINIC | ZA | 25th Mar 1994 |
| 196.10.201.0/24 | 256 | AFRINIC | ZA | 10th Jul 1994 |