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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,586 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 101.244.0.0/16 | 65.5k | APNIC |  CN | 10th Jan 2011 |
| 101.251.16.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 101.251.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 101.251.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 101.36.0.0/18 | 16.4k | APNIC | CN | 14th Dec 2010 |
| 101.48.0.0/16 | 65.5k | APNIC | CN | 10th Dec 2010 |
| 101.54.0.0/16 | 65.5k | APNIC | CN | 16th Dec 2010 |
| 101.55.224.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 101.55.67.0/24 | 256 | APNIC |  KR | 10th Feb 2011 |
| 101.78.32.0/19 | 8.2k | APNIC | CN | 11th Mar 2011 |
| 101.79.128.0/21 | 2k | APNIC | KR | 17th Dec 2010 |
| 101.79.138.0/23 | 512 | APNIC | KR | 17th Dec 2010 |
| 101.79.140.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.176.0/21 | 2k | APNIC | KR | 17th Dec 2010 |
| 101.79.184.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.188.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.192.0/20 | 4.1k | APNIC | KR | 17th Dec 2010 |
| 101.79.252.0/23 | 512 | APNIC | KR | 17th Dec 2010 |
| 101.79.4.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.40.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.44.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.48.0/20 | 4.1k | APNIC | KR | 17th Dec 2010 |
| 101.79.76.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.88.0/22 | 1k | APNIC | KR | 17th Dec 2010 |
| 101.79.96.0/19 | 8.2k | APNIC | KR | 17th Dec 2010 |
| 101.96.0.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 101.96.16.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 101.97.128.0/17 | 32.8k | APNIC |  JP | 7th Apr 2011 |
| 101.99.96.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 103.1.0.0/22 | 1k | APNIC |  AU | 5th Apr 2011 |
| 103.1.124.0/22 | 1k | APNIC |  IN | 18th Apr 2011 |
| 103.1.132.0/22 | 1k | APNIC |  MY | 18th Apr 2011 |
| 103.1.140.0/22 | 1k | APNIC | JP | 18th Apr 2011 |
| 103.1.164.0/22 | 1k | APNIC |  TH | 19th Apr 2011 |
| 103.1.172.0/22 | 1k | APNIC |  SG | 19th Apr 2011 |
| 103.1.24.0/22 | 1k | APNIC | CN | 18th Apr 2011 |
| 103.1.4.0/24 | 256 | APNIC | AU | 5th Apr 2011 |
| 103.1.6.0/24 | 256 | APNIC | IN | 9th May 2011 |
| 103.1.72.0/22 | 1k | APNIC | CN | 18th Apr 2011 |
| 103.1.76.0/22 | 1k | APNIC | AU | 18th Apr 2011 |
| 103.1.84.0/22 | 1k | APNIC | SG | 18th Apr 2011 |
| 103.1.88.0/22 | 1k | APNIC | CN | 18th Apr 2011 |
| 103.10.112.0/22 | 1k | APNIC | JP | 14th Jun 2011 |
| 103.10.140.0/22 | 1k | APNIC | CN | 21st Jul 2011 |
| 103.10.16.0/22 | 1k | APNIC | CN | 13th May 2011 |
| 103.10.162.0/23 | 512 | APNIC | MY | 22nd Jul 2011 |
| 103.10.180.0/22 | 1k | APNIC | IN | 27th Jul 2011 |
| 103.10.184.0/22 | 1k | APNIC |  ID | 27th Jul 2011 |
| 103.10.192.0/23 | 512 | APNIC | ID | 21st Sept 2022 |
| 103.10.197.0/24 | 256 | APNIC |  HK | 29th Jul 2011 |