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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 202.38.146.0/23 | 512 | APNIC |  CN | 31st Aug 1994 |
| 202.38.148.0/24 | 256 | APNIC |  AU | 20th Oct 2003 |
| 202.38.149.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.38.150.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.38.154.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.38.156.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.38.158.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.38.168.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.38.170.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.38.176.0/23 | 512 | APNIC | CN | 21st Dec 1994 |
| 202.38.178.0/23 | 512 | APNIC |  HK | 24th Dec 2003 |
| 202.38.2.0/23 | 512 | APNIC | CN | 1st Jul 1994 |
| 202.38.48.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.38.6.0/23 | 512 | APNIC | HK | 6th Apr 2011 |
| 202.39.112.0/20 | 4.1k | APNIC |  TW | 16th Dec 1994 |
| 202.4.162.0/23 | 512 | APNIC | HK | 5th Jan 2018 |
| 202.4.164.0/24 | 256 | APNIC |  US | 24th Sept 2009 |
| 202.4.166.0/24 | 256 | APNIC | AU | 1st Oct 2009 |
| 202.4.184.0/24 | 256 | APNIC |  SG | 8th Dec 2009 |
| 202.4.185.0/24 | 256 | APNIC |  ID | 8th Dec 2009 |
| 202.4.187.0/24 | 256 | RIPE NCC |  ES | 9th Feb 2016 |
| 202.4.240.0/22 | 1k | APNIC | AU | 4th Aug 2004 |
| 202.4.25.0/24 | 256 | APNIC |  IN | 14th Feb 2006 |
| 202.40.135.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.136.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.14.0/24 | 256 | APNIC | IN | 18th Jul 1994 |
| 202.40.140.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.142.0/24 | 256 | APNIC | HK | 27th Jan 1994 |
| 202.40.143.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.144.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.40.15.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.150.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.155.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.156.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.158.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.40.160.0/24 | 256 | APNIC | HK | 7th Jan 2010 |
| 202.40.161.0/24 | 256 | APNIC | HK | 22nd Jan 1995 |
| 202.40.162.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.163.0/24 | 256 | APNIC | AU | 20th Nov 2003 |
| 202.40.172.0/22 | 1k | APNIC |  PH | 16th Aug 2006 |
| 202.40.32.0/19 | 8.2k | APNIC | IN | 29th Nov 1993 |
| 202.40.4.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.40.64.0/18 | 16.4k | APNIC | IN | 29th Nov 1993 |
| 202.40.7.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.40.8.0/22 | 1k | APNIC | IN | 18th Jul 1994 |
| 202.41.11.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.41.112.0/20 | 4.1k | APNIC | IN | 27th Dec 1995 |
| 202.41.12.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.41.128.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.41.130.0/23 | 512 | APNIC | CN | 14th Apr 2011 |