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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 116.215.0.0/16 | 65.5k | APNIC |  CN | 30th Apr 2007 |
| 116.244.0.0/15 | 131k | APNIC | CN | 3rd Apr 2007 |
| 116.254.128.0/17 | 32.8k | APNIC | CN | 26th Mar 2007 |
| 116.50.0.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 116.58.128.0/20 | 4.1k | APNIC | CN | 2nd Apr 2007 |
| 116.66.112.0/21 | 2k | APNIC | CN | 30th Apr 2007 |
| 116.66.120.0/24 | 256 | APNIC | CN | 30th Apr 2007 |
| 116.66.121.0/24 | 256 | APNIC | CN | 30th Apr 2007 |
| 116.66.122.0/24 | 256 | APNIC | CN | 30th Apr 2007 |
| 116.66.124.0/22 | 1k | APNIC | CN | 30th Apr 2007 |
| 116.66.160.0/20 | 4.1k | APNIC |  AU | 3rd May 2007 |
| 116.66.184.0/22 | 1k | APNIC |  SG | 18th Jul 2016 |
| 116.66.64.0/19 | 8.2k | APNIC | CN | 30th Apr 2007 |
| 116.68.128.0/21 | 2k | APNIC |  VN | 10th May 2007 |
| 116.68.224.0/21 | 2k | APNIC |  ID | 17th May 2007 |
| 116.68.232.0/21 | 2k | APNIC |  KR | 17th May 2007 |
| 116.69.0.0/16 | 65.5k | APNIC | CN | 10th May 2007 |
| 116.89.128.0/20 | 4.1k | APNIC |  TW | 21st May 2007 |
| 116.89.144.0/20 | 4.1k | APNIC | CN | 22nd May 2007 |
| 116.90.184.0/21 | 2k | APNIC | CN | 28th May 2007 |
| 116.91.16.0/20 | 4.1k | ARIN |  US | 26th Jun 2024 |
| 116.92.0.0/24 | 256 | APNIC |  HK | 22nd May 2007 |
| 116.92.1.0/24 | 256 | APNIC |  JP | 22nd May 2007 |
| 116.92.10.0/24 | 256 | APNIC | HK | 22nd May 2007 |
| 116.92.11.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.12.0/23 | 512 | APNIC | JP | 22nd May 2007 |
| 116.92.131.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.132.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.134.0/23 | 512 | APNIC | JP | 22nd May 2007 |
| 116.92.136.0/21 | 2k | APNIC | JP | 22nd May 2007 |
| 116.92.14.0/24 | 256 | APNIC | HK | 22nd May 2007 |
| 116.92.144.0/20 | 4.1k | APNIC | JP | 22nd May 2007 |
| 116.92.15.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.16.0/20 | 4.1k | APNIC | JP | 22nd May 2007 |
| 116.92.160.0/20 | 4.1k | APNIC | JP | 22nd May 2007 |
| 116.92.176.0/21 | 2k | APNIC | JP | 22nd May 2007 |
| 116.92.248.0/21 | 2k | APNIC | JP | 22nd May 2007 |
| 116.92.3.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.32.0/19 | 8.2k | APNIC | JP | 22nd May 2007 |
| 116.92.5.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.6.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 116.92.7.0/24 | 256 | APNIC | JP | 22nd May 2007 |
| 117.100.0.0/15 | 131k | APNIC | CN | 9th Jul 2007 |
| 117.103.0.0/21 | 2k | APNIC | ID | 16th Jul 2007 |
| 117.103.114.0/23 | 512 | APNIC | ID | 25th Sept 2017 |
| 117.103.128.0/20 | 4.1k | APNIC | CN | 20th Jul 2007 |
| 117.103.16.0/20 | 4.1k | APNIC | CN | 16th Jul 2007 |
| 117.103.40.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 117.103.48.0/20 | 4.1k | APNIC | ID | 18th Jul 2007 |
| 117.103.72.0/21 | 2k | APNIC | CN | 12th Apr 2011 |