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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 111.235.39.0/24 | 256 | APNIC |  JP | 7th Aug 2009 |
| 111.235.46.0/23 | 512 | APNIC | JP | 7th Aug 2009 |
| 111.235.96.0/19 | 8.2k | APNIC |  CN | 14th Aug 2009 |
| 111.67.192.0/20 | 4.1k | APNIC | CN | 4th Jun 2009 |
| 111.67.224.0/19 | 8.2k | APNIC |  KR | 5th Jun 2009 |
| 111.68.64.0/19 | 8.2k | APNIC | CN | 10th Jun 2009 |
| 111.88.136.0/23 | 512 | APNIC |  PK | 12th Jun 2009 |
| 111.88.16.0/20 | 4.1k | APNIC | PK | 12th Jun 2009 |
| 111.88.172.0/22 | 1k | RIPE NCC |  RU | 12th Jun 2009 |
| 111.88.176.0/21 | 2k | RIPE NCC | RU | 12th Jun 2009 |
| 111.88.192.0/20 | 4.1k | RIPE NCC | RU | 12th Jun 2009 |
| 111.88.208.0/22 | 1k | RIPE NCC | RU | 12th Jun 2009 |
| 111.88.32.0/19 | 8.2k | APNIC | PK | 12th Jun 2009 |
| 111.88.64.0/21 | 2k | APNIC | PK | 12th Jun 2009 |
| 111.88.72.0/23 | 512 | APNIC | PK | 12th Jun 2009 |
| 111.88.75.0/24 | 256 | APNIC | PK | 12th Jun 2009 |
| 111.88.8.0/21 | 2k | APNIC | PK | 12th Jun 2009 |
| 111.88.80.0/20 | 4.1k | APNIC | PK | 12th Jun 2009 |
| 111.91.192.0/19 | 8.2k | APNIC |  SG | 23rd Jun 2009 |
| 111.92.192.0/19 | 8.2k | APNIC | SG | 25th Jun 2009 |
| 111.92.248.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 111.92.252.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 112.128.0.0/14 | 262k | APNIC | CN | 22nd Jan 2009 |
| 112.137.0.0/20 | 4.1k | APNIC |  BD | 3rd Feb 2009 |
| 112.137.48.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 112.72.16.0/20 | 4.1k | APNIC | KR | 24th Dec 2008 |
| 112.72.32.0/19 | 8.2k | APNIC | KR | 24th Dec 2008 |
| 112.72.64.0/18 | 16.4k | APNIC |  VN | 24th Dec 2008 |
| 112.78.224.0/19 | 8.2k | APNIC | SG | 13th Jan 2009 |
| 112.78.64.0/19 | 8.2k | APNIC |  TW | 6th Jan 2009 |
| 113.11.192.0/19 | 8.2k | APNIC | CN | 29th Sept 2008 |
| 113.192.14.0/23 | 512 | APNIC |  ID | 7th Dec 2023 |
| 113.192.20.0/23 | 512 | APNIC | JP | 7th Dec 2023 |
| 113.192.22.0/23 | 512 | APNIC | JP | 7th Dec 2023 |
| 113.192.40.0/23 | 512 | APNIC | CN | 8th Dec 2023 |
| 113.192.42.0/23 | 512 | APNIC | BD | 8th Dec 2023 |
| 113.197.104.0/22 | 1k | APNIC | SG | 5th Dec 2008 |
| 113.197.72.0/21 | 2k | APNIC |  PH | 2nd Dec 2008 |
| 113.202.0.0/16 | 65.5k | APNIC | CN | 28th Nov 2008 |
| 113.203.224.0/21 | 2k | APNIC | PK | 24th Dec 2010 |
| 113.203.241.0/24 | 256 | APNIC | PK | 24th Dec 2010 |
| 113.208.128.0/17 | 32.8k | APNIC | CN | 5th Dec 2008 |
| 113.21.0.0/19 | 8.2k | APNIC | KR | 9th Oct 2008 |
| 113.212.0.0/18 | 16.4k | APNIC | CN | 5th Dec 2008 |
| 113.212.100.0/22 | 1k | APNIC | CN | 29th Dec 2010 |
| 113.212.128.0/19 | 8.2k | APNIC | JP | 9th Dec 2008 |
| 113.212.184.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 113.212.68.0/22 | 1k | APNIC | ID | 13th Jun 2019 |
| 113.212.78.0/23 | 512 | APNIC | TW | 27th Jun 2019 |
| 113.212.80.0/22 | 1k | APNIC |  IN | 13th Jun 2019 |