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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 124.6.64.0/18 | 16.4k | APNIC |  CN | 12th Dec 2005 |
| 124.66.160.0/21 | 2k | APNIC |  ID | 1st Nov 2006 |
| 124.68.64.0/18 | 16.4k | APNIC | CN | 16th Aug 2006 |
| 124.69.0.0/16 | 65.5k | APNIC | CN | 16th Aug 2006 |
| 125.169.0.0/16 | 65.5k | APNIC | CN | 20th Mar 2007 |
| 125.171.0.0/16 | 65.5k | APNIC | CN | 26th Sept 2005 |
| 125.236.0.0/19 | 8.2k | APNIC |  NZ | 20th Oct 2005 |
| 125.236.34.0/24 | 256 | APNIC | NZ | 20th Oct 2005 |
| 125.236.35.0/24 | 256 | APNIC | NZ | 20th Oct 2005 |
| 125.236.36.0/22 | 1k | APNIC | NZ | 20th Oct 2005 |
| 125.236.46.0/23 | 512 | APNIC | NZ | 20th Oct 2005 |
| 125.236.96.0/19 | 8.2k | APNIC | NZ | 20th Oct 2005 |
| 125.253.144.0/20 | 4.1k | APNIC |  US | 5th Dec 2005 |
| 125.254.192.0/18 | 16.4k | APNIC | CN | 10th Jan 2007 |
| 125.3.192.0/21 | 2k | APNIC |  SG | 25th Nov 2005 |
| 125.31.192.0/18 | 16.4k | APNIC | CN | 27th Aug 2005 |
| 125.58.0.0/18 | 16.4k | APNIC |  VN | 11th Apr 2011 |
| 125.6.64.0/19 | 8.2k | APNIC |  JP | 4th Aug 2005 |
| 125.6.96.0/20 | 4.1k | APNIC | JP | 4th Aug 2005 |
| 125.60.96.0/19 | 8.2k | APNIC |  KR | 2nd Sept 2005 |
| 125.61.128.0/17 | 32.8k | APNIC | CN | 12th Nov 2007 |
| 125.62.240.0/20 | 4.1k | APNIC | JP | 10th Oct 2007 |
| 125.62.92.0/22 | 1k | APNIC | ID | 14th Dec 2017 |
| 125.63.48.0/20 | 4.1k | APNIC |  AU | 17th Jan 2011 |
| 125.96.0.0/15 | 131k | APNIC | CN | 22nd Aug 2005 |
| 126.188.0.0/15 | 131k | APNIC | JP | 8th Feb 2005 |
| 126.209.192.0/19 | 8.2k | APNIC | JP | 8th Feb 2005 |
| 126.231.0.0/16 | 65.5k | APNIC | US | 8th Feb 2005 |
| 126.242.0.0/15 | 131k | APNIC | US | 8th Feb 2005 |
| 126.52.100.0/22 | 1k | APNIC | JP | 8th Feb 2005 |
| 126.52.104.0/21 | 2k | APNIC | JP | 8th Feb 2005 |
| 126.52.112.0/20 | 4.1k | APNIC | JP | 8th Feb 2005 |
| 126.52.160.0/19 | 8.2k | APNIC | JP | 8th Feb 2005 |
| 126.52.192.0/18 | 16.4k | APNIC | JP | 8th Feb 2005 |
| 126.52.24.0/22 | 1k | APNIC | JP | 8th Feb 2005 |
| 126.52.28.0/22 | 1k | APNIC | JP | 8th Feb 2005 |
| 126.52.64.0/19 | 8.2k | APNIC | JP | 8th Feb 2005 |
| 126.52.96.0/22 | 1k | APNIC | JP | 8th Feb 2005 |
| 128.0.0.0/24 | 256 | RIPE NCC |  NL | 14th Sept 2012 |
| 128.0.1.0/24 | 256 | RIPE NCC |  AE | 14th Sept 2012 |
| 128.0.107.0/24 | 256 | RIPE NCC |  CY | 14th Sept 2012 |
| 128.0.108.0/22 | 1k | RIPE NCC | CY | 14th Sept 2012 |
| 128.0.32.0/24 | 256 | RIPE NCC |  SC | 14th Sept 2012 |
| 128.0.33.0/24 | 256 | RIPE NCC |  CH | 14th Sept 2012 |
| 128.0.38.0/23 | 512 | RIPE NCC |  GB | 14th Sept 2012 |
| 128.0.45.0/24 | 256 | RIPE NCC |  IQ | 14th Sept 2012 |
| 128.0.58.0/23 | 512 | RIPE NCC |  RO | 14th Sept 2012 |
| 128.126.0.0/16 | 65.5k | ARIN | US | 15th May 1986 |
| 128.128.64.0/20 | 4.1k | ARIN | US | 21st May 1986 |
| 128.140.128.0/20 | 4.1k | RIPE NCC |  FR | 11th Oct 2011 |