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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,493 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 202.22.28.0/23 | 512 | APNIC |  NZ | 3rd Feb 1999 |
| 202.22.30.0/24 | 256 | APNIC | NZ | 3rd Feb 1999 |
| 202.22.32.0/19 | 8.2k | APNIC |  KR | 9th Aug 2006 |
| 202.22.64.0/18 | 16.4k | APNIC |  JP | 14th Apr 2010 |
| 202.27.0.0/21 | 2k | APNIC | NZ | 4th Mar 1994 |
| 202.27.10.0/23 | 512 | APNIC |  AU | 15th Nov 2018 |
| 202.27.100.0/22 | 1k | APNIC | NZ | 11th Aug 1998 |
| 202.27.115.0/24 | 256 | APNIC | NZ | 17th Nov 1995 |
| 202.27.116.0/23 | 512 | APNIC | NZ | 17th Nov 1995 |
| 202.27.12.0/24 | 256 | APNIC |  CN | 9th Jun 2016 |
| 202.27.136.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.27.14.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.27.146.0/23 | 512 | APNIC | NZ | 3rd Apr 1995 |
| 202.27.169.0/24 | 256 | APNIC | NZ | 14th Jun 2002 |
| 202.27.176.0/21 | 2k | APNIC | NZ | 25th Sept 2000 |
| 202.27.191.0/24 | 256 | APNIC | NZ | 28th May 1996 |
| 202.27.238.0/24 | 256 | APNIC | AU | 19th Apr 1995 |
| 202.27.246.0/24 | 256 | APNIC | NZ | 7th May 1996 |
| 202.27.250.0/24 | 256 | ARIN |  US | 23rd Jan 2023 |
| 202.27.78.0/23 | 512 | APNIC | NZ | 4th May 2010 |
| 202.27.83.0/24 | 256 | RIPE NCC |  MK | 8th Feb 1996 |
| 202.27.85.0/24 | 256 | APNIC | NZ | 12th Feb 1996 |
| 202.27.86.0/23 | 512 | APNIC | NZ | 20th Jun 1996 |
| 202.27.91.0/24 | 256 | APNIC | NZ | 12th Jun 1995 |
| 202.27.92.0/24 | 256 | APNIC | NZ | 3rd Feb 1999 |
| 202.27.93.0/24 | 256 | APNIC | NZ | 27th Mar 1998 |
| 202.27.94.0/23 | 512 | APNIC | NZ | 27th Mar 1998 |
| 202.27.97.0/24 | 256 | APNIC | NZ | 24th Oct 1995 |
| 202.3.128.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.3.132.0/24 | 256 | APNIC | AU | 19th Sept 2005 |
| 202.3.133.0/24 | 256 | APNIC | AU | 30th Aug 2002 |
| 202.3.134.0/24 | 256 | APNIC |  HK | 14th Jan 2019 |
| 202.3.135.0/24 | 256 | APNIC |  SG | 9th Jan 2003 |
| 202.3.136.0/24 | 256 | APNIC |  ID | 15th Mar 2024 |
| 202.3.138.0/23 | 512 | APNIC | SG | 30th May 2003 |
| 202.30.125.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.30.126.0/23 | 512 | APNIC | KR | 29th Feb 1996 |
| 202.30.35.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.30.39.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.30.50.0/23 | 512 | APNIC | KR | 29th Feb 1996 |
| 202.30.52.0/23 | 512 | APNIC | KR | 29th Feb 1996 |
| 202.30.56.0/23 | 512 | APNIC | KR | 29th Feb 1996 |
| 202.31.154.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.31.155.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.31.156.0/22 | 1k | APNIC | KR | 29th Feb 1996 |
| 202.31.160.0/20 | 4.1k | APNIC | KR | 29th Feb 1996 |
| 202.31.180.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.31.181.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.31.183.0/24 | 256 | APNIC | KR | 29th Feb 1996 |
| 202.31.208.0/22 | 1k | APNIC | KR | 29th Feb 1996 |