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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 115.187.12.0/22 | 1k | APNIC |  CN | 30th Nov 2015 |
| 115.187.4.0/22 | 1k | APNIC | CN | 30th Nov 2015 |
| 115.187.8.0/22 | 1k | APNIC | CN | 30th Nov 2015 |
| 115.187.80.0/21 | 2k | APNIC |  KR | 19th Sept 2008 |
| 115.31.208.0/20 | 4.1k | APNIC |  JP | 14th Jul 2008 |
| 115.31.224.0/19 | 8.2k | APNIC |  SG | 11th Jul 2008 |
| 115.31.68.0/22 | 1k | APNIC | CN | 30th Nov 2015 |
| 115.31.72.0/22 | 1k | APNIC | CN | 30th Nov 2015 |
| 115.31.76.0/22 | 1k | APNIC | CN | 30th Nov 2015 |
| 115.42.48.0/22 | 1k | APNIC |  IN | 7th Jan 2016 |
| 115.42.56.0/22 | 1k | APNIC | CN | 8th Jan 2016 |
| 115.42.80.0/20 | 4.1k | APNIC |  TW | 9th Mar 2011 |
| 115.47.0.0/16 | 65.5k | APNIC | CN | 11th Jul 2008 |
| 115.69.128.0/19 | 8.2k | APNIC | IN | 18th Jul 2008 |
| 115.69.64.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 115.80.0.0/14 | 262k | APNIC | TW | 22nd Jul 2008 |
| 116.0.24.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 116.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 116.193.0.0/21 | 2k | APNIC | SG | 5th Apr 2007 |
| 116.193.157.0/24 | 256 | APNIC |  MY | 13th Apr 2007 |
| 116.193.158.0/23 | 512 | APNIC |  HK | 30th Jan 2011 |
| 116.193.160.0/22 | 1k | ARIN |  US | 13th Mar 2024 |
| 116.193.164.0/22 | 1k | APNIC | HK | 30th Oct 2015 |
| 116.193.176.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 116.193.32.0/19 | 8.2k | APNIC | CN | 10th Apr 2007 |
| 116.193.8.0/21 | 2k | APNIC |  MO | 11th Apr 2007 |
| 116.194.0.0/15 | 131k | APNIC | CN | 10th Apr 2007 |
| 116.197.156.0/22 | 1k | APNIC |  PK | 11th Oct 2018 |
| 116.199.192.0/21 | 2k | APNIC |  ID | 20th Apr 2007 |
| 116.199.206.0/23 | 512 | APNIC | IN | 2nd Nov 2023 |
| 116.204.167.0/24 | 256 | APNIC | PK | 15th Oct 2018 |
| 116.204.188.0/22 | 1k | APNIC | IN | 25th Oct 2018 |
| 116.206.112.0/22 | 1k | APNIC |  TH | 9th Feb 2017 |
| 116.206.116.0/22 | 1k | APNIC | HK | 9th Feb 2017 |
| 116.206.76.0/22 | 1k | APNIC | SG | 7th Feb 2017 |
| 116.212.160.0/20 | 4.1k | APNIC | CN | 26th Apr 2007 |
| 116.212.186.0/24 | 256 | APNIC |  BD | 27th Apr 2007 |
| 116.212.80.0/20 | 4.1k | APNIC | TW | 24th Apr 2007 |
| 116.213.128.0/17 | 32.8k | APNIC | CN | 27th Apr 2007 |
| 116.213.20.0/22 | 1k | APNIC | JP | 7th Jan 2011 |
| 116.213.24.0/21 | 2k | APNIC | ID | 2nd Feb 2011 |
| 116.213.4.0/24 | 256 | APNIC |  AU | 27th Apr 2007 |
| 116.213.64.0/18 | 16.4k | APNIC | CN | 27th Apr 2007 |
| 116.214.0.0/20 | 4.1k | APNIC | TW | 30th Apr 2007 |
| 116.214.122.0/24 | 256 | RIPE NCC |  GB | 1st May 2007 |
| 116.214.123.0/24 | 256 | APNIC | SG | 1st May 2007 |
| 116.214.124.0/24 | 256 | RIPE NCC | GB | 1st May 2007 |
| 116.214.125.0/24 | 256 | APNIC | SG | 1st May 2007 |
| 116.214.126.0/23 | 512 | APNIC | SG | 1st May 2007 |
| 116.214.64.0/20 | 4.1k | APNIC | CN | 30th Apr 2007 |