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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,575 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 120.138.0.0/22 | 1k | APNIC |  IN | 27th Nov 2015 |
| 120.139.0.0/16 | 65.5k | APNIC |  MY | 14th Apr 2008 |
| 120.143.128.0/19 | 8.2k | APNIC |  CN | 12th Apr 2011 |
| 120.143.192.0/18 | 16.4k | APNIC |  KR | 22nd Apr 2008 |
| 120.160.0.0/11 | 2.1M | APNIC |  ID | 14th Apr 2008 |
| 120.29.32.0/19 | 8.2k | APNIC |  AU | 14th Mar 2008 |
| 120.30.0.0/16 | 65.5k | APNIC | CN | 18th Mar 2008 |
| 120.50.184.0/21 | 2k | APNIC |  VN | 27th Mar 2008 |
| 120.51.96.0/19 | 8.2k | APNIC |  SG | 20th Mar 2008 |
| 120.88.176.0/22 | 1k | APNIC | IN | 4th Mar 2011 |
| 120.88.188.0/22 | 1k | APNIC | IN | 4th Mar 2011 |
| 120.88.8.0/21 | 2k | APNIC | CN | 31st Mar 2009 |
| 120.90.0.0/15 | 131k | APNIC | CN | 28th Mar 2008 |
| 121.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.100.128.0/17 | 32.8k | APNIC | CN | 3rd Jul 2006 |
| 121.101.0.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 121.101.136.0/21 | 2k | APNIC | AU | 15th Nov 2007 |
| 121.101.144.0/20 | 4.1k | APNIC |  US | 16th Nov 2007 |
| 121.101.208.0/20 | 4.1k | APNIC | CN | 20th Nov 2007 |
| 121.200.192.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.200.218.0/23 | 512 | APNIC |  PH | 18th Sept 2025 |
| 121.46.112.0/22 | 1k | APNIC | IN | 27th Jan 2016 |
| 121.46.116.0/22 | 1k | APNIC |  HK | 27th Jan 2016 |
| 121.46.76.0/22 | 1k | APNIC | CN | 26th Jan 2016 |
| 121.46.92.0/22 | 1k | APNIC | IN | 27th Jan 2016 |
| 121.47.0.0/16 | 65.5k | APNIC | CN | 22nd Jun 2006 |
| 121.50.128.0/20 | 4.1k | APNIC | ID | 15th Jun 2006 |
| 121.50.172.0/22 | 1k | APNIC | VN | 17th Nov 2015 |
| 121.50.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.52.128.0/21 | 2k | APNIC | ID | 1st Nov 2007 |
| 121.54.176.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.58.136.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.58.160.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 121.58.168.0/21 | 2k | APNIC | IN | 13th Nov 2007 |
| 121.91.136.0/21 | 2k | APNIC | HK | 26th Nov 2007 |
| 121.91.88.0/21 | 2k | APNIC | HK | 5th Oct 2007 |
| 122.0.128.0/17 | 32.8k | APNIC | CN | 7th Jul 2006 |
| 122.0.8.0/21 | 2k | APNIC | KR | 26th Sept 2006 |
| 122.10.164.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.168.0/21 | 2k | APNIC | CN | 14th Aug 2006 |
| 122.10.176.0/20 | 4.1k | APNIC | CN | 14th Aug 2006 |
| 122.10.192.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.208.0/21 | 2k | APNIC | CN | 14th Aug 2006 |
| 122.10.216.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.228.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.10.232.0/21 | 2k | APNIC | CN | 14th Aug 2006 |
| 122.10.240.0/22 | 1k | APNIC | CN | 14th Aug 2006 |
| 122.100.32.0/19 | 8.2k | APNIC | KR | 12th Oct 2006 |
| 122.102.0.0/20 | 4.1k | APNIC | CN | 31st Oct 2006 |
| 122.102.120.0/23 | 512 | APNIC | ID | 11th Aug 2025 |