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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.47.128.0/24 | 256 | APNIC |  CN | 14th Apr 2011 |
| 202.47.130.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.47.161.0/24 | 256 | APNIC |  ID | 14th Nov 2023 |
| 202.47.168.0/23 | 512 | APNIC | ID | 14th Nov 2023 |
| 202.47.170.0/23 | 512 | APNIC | ID | 14th Nov 2023 |
| 202.47.194.0/24 | 256 | APNIC |  HK | 13th Mar 2000 |
| 202.47.82.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.47.86.0/24 | 256 | APNIC |  AU | 22nd Dec 2009 |
| 202.47.96.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 202.49.12.0/23 | 512 | APNIC |  NZ | 15th Mar 1994 |
| 202.49.169.0/24 | 256 | APNIC | NZ | 7th Oct 1999 |
| 202.49.180.0/23 | 512 | APNIC | NZ | 13th Nov 2003 |
| 202.49.190.0/24 | 256 | APNIC | NZ | 16th Feb 1996 |
| 202.49.192.0/22 | 1k | APNIC | NZ | 22nd Mar 1995 |
| 202.49.196.0/24 | 256 | APNIC | NZ | 17th May 1995 |
| 202.49.206.0/24 | 256 | APNIC | NZ | 1st Aug 1995 |
| 202.49.216.0/21 | 2k | APNIC | NZ | 22nd Aug 1995 |
| 202.49.32.0/24 | 256 | APNIC | AU | 23rd Aug 1994 |
| 202.49.38.0/24 | 256 | APNIC | NZ | 16th Dec 1994 |
| 202.49.39.0/24 | 256 | APNIC | NZ | 11th Oct 1995 |
| 202.49.49.0/24 | 256 | APNIC | NZ | 21st Jul 1998 |
| 202.49.50.0/24 | 256 | APNIC | NZ | 17th Feb 1995 |
| 202.49.8.0/22 | 1k | APNIC | NZ | 15th Mar 1994 |
| 202.49.82.0/24 | 256 | APNIC | NZ | 29th Oct 2003 |
| 202.49.91.0/24 | 256 | APNIC | NZ | 14th Aug 1995 |
| 202.5.10.0/23 | 512 | APNIC |  TW | 24th Sept 2002 |
| 202.5.190.0/24 | 256 | APNIC | AU | 20th Mar 2002 |
| 202.5.208.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 202.5.212.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 202.5.216.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 202.5.8.0/23 | 512 | APNIC | TW | 24th Sept 2002 |
| 202.5.80.0/20 | 4.1k | APNIC |  TH | 28th May 2003 |
| 202.50.100.0/24 | 256 | APNIC | NZ | 18th Dec 1995 |
| 202.50.110.0/24 | 256 | APNIC | NZ | 18th Jan 1996 |
| 202.50.113.0/24 | 256 | APNIC |  BD | 1st May 2024 |
| 202.50.158.0/24 | 256 | APNIC | NZ | 8th Sept 1995 |
| 202.50.160.0/22 | 1k | APNIC | NZ | 31st Aug 1995 |
| 202.50.172.0/23 | 512 | APNIC | NZ | 4th Oct 1995 |
| 202.50.174.0/24 | 256 | APNIC | AU | 4th Oct 1995 |
| 202.50.206.0/23 | 512 | APNIC | NZ | 21st Dec 1995 |
| 202.50.220.0/24 | 256 | APNIC | NZ | 5th Jan 1996 |
| 202.50.222.0/24 | 256 | APNIC | NZ | 6th Jun 1996 |
| 202.50.224.0/22 | 1k | APNIC | NZ | 12th Jun 1995 |
| 202.50.228.0/23 | 512 | APNIC | NZ | 12th Jun 1995 |
| 202.50.230.0/24 | 256 | APNIC | NZ | 12th Jun 1995 |
| 202.50.242.0/24 | 256 | APNIC |  MY | 7th May 2024 |
| 202.50.253.0/24 | 256 | RIPE NCC |  IT | 9th Sept 1996 |
| 202.50.32.0/20 | 4.1k | APNIC | NZ | 14th May 1994 |
| 202.50.74.0/24 | 256 | APNIC | NZ | 4th Nov 1996 |
| 202.50.75.0/24 | 256 | APNIC | NZ | 6th Nov 1996 |