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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,595 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 61.14.244.0/22 | 1k | APNIC |  CN | 30th Dec 2015 |
| 61.16.160.0/19 | 8.2k | APNIC |  IN | 3rd Mar 2003 |
| 61.16.28.0/22 | 1k | APNIC |  SG | 8th Nov 2000 |
| 61.245.104.0/22 | 1k | APNIC |  JP | 21st Jul 2005 |
| 61.245.124.0/22 | 1k | APNIC | JP | 21st Jul 2005 |
| 61.248.0.0/17 | 32.8k | APNIC |  KR | 21st Mar 2001 |
| 61.248.128.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.248.160.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.248.192.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.248.228.0/22 | 1k | APNIC | KR | 21st Mar 2001 |
| 61.248.232.0/21 | 2k | APNIC | KR | 21st Mar 2001 |
| 61.249.0.0/18 | 16.4k | APNIC | KR | 21st Mar 2001 |
| 61.249.160.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.249.192.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.249.64.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.249.80.0/21 | 2k | APNIC | KR | 21st Mar 2001 |
| 61.249.88.0/22 | 1k | APNIC | KR | 21st Mar 2001 |
| 61.251.128.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.251.32.0/19 | 8.2k | APNIC | KR | 21st Mar 2001 |
| 61.251.80.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.252.0.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.252.64.0/22 | 1k | APNIC | KR | 21st Mar 2001 |
| 61.252.68.0/22 | 1k | APNIC | KR | 21st Mar 2001 |
| 61.252.72.0/22 | 1k | APNIC | KR | 21st Mar 2001 |
| 61.252.80.0/20 | 4.1k | APNIC | KR | 21st Mar 2001 |
| 61.28.0.0/20 | 4.1k | APNIC | CN | 28th Mar 2001 |
| 61.29.192.0/19 | 8.2k | APNIC | CN | 10th Dec 2004 |
| 61.29.224.0/20 | 4.1k | APNIC | CN | 10th Dec 2004 |
| 61.4.176.0/20 | 4.1k | APNIC | CN | 29th Jan 2007 |
| 61.4.84.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 61.4.88.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 61.44.0.0/23 | 512 | APNIC | JP | 28th Aug 2003 |
| 61.44.2.0/24 | 256 | APNIC | JP | 28th Aug 2003 |
| 61.44.3.0/24 | 256 | APNIC | JP | 28th Aug 2003 |
| 61.44.4.0/22 | 1k | APNIC | JP | 28th Aug 2003 |
| 61.44.67.0/24 | 256 | APNIC | JP | 26th Sept 2003 |
| 61.44.8.0/21 | 2k | APNIC | JP | 28th Aug 2003 |
| 61.45.128.0/18 | 16.4k | APNIC | CN | 31st Jan 2005 |
| 61.45.224.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 61.45.248.0/23 | 512 | APNIC |  AU | 27th Sept 2010 |
| 61.45.250.0/24 | 256 | APNIC | AU | 7th Apr 2010 |
| 61.45.251.0/24 | 256 | APNIC | AU | 7th Apr 2010 |
| 61.45.252.0/22 | 1k | APNIC | AU | 7th Apr 2010 |
| 61.47.0.0/24 | 256 | APNIC | JP | 1st Mar 2005 |
| 61.47.102.0/23 | 512 | APNIC | JP | 1st Mar 2005 |
| 61.47.108.0/22 | 1k | APNIC | JP | 1st Mar 2005 |
| 61.47.15.0/24 | 256 | APNIC | JP | 1st Mar 2005 |
| 61.47.17.0/24 | 256 | APNIC | JP | 1st Mar 2005 |
| 61.47.20.0/24 | 256 | APNIC | SG | 1st Mar 2005 |
| 61.47.21.0/24 | 256 | APNIC | JP | 1st Mar 2005 |