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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,738 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 102.64.6.0/24 | 256 | AFRINIC |  NG | 7th Aug 2019 |
| 102.67.172.0/22 | 1k | AFRINIC |  BF | 19th Apr 2019 |
| 102.67.60.0/22 | 1k | AFRINIC |  CD | 17th Apr 2019 |
| 102.68.104.0/22 | 1k | AFRINIC | NG | 3rd Apr 2019 |
| 102.68.143.0/24 | 256 | AFRINIC |  ZA | 27th May 2019 |
| 102.68.32.0/21 | 2k | AFRINIC | BF | 8th Feb 2019 |
| 102.69.180.0/22 | 1k | AFRINIC | CD | 1st Mar 2019 |
| 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 |
| 103.10.198.0/24 | 256 | APNIC | HK | 29th Jul 2011 |
| 103.10.199.0/24 | 256 | APNIC | HK | 29th Jul 2011 |
| 103.10.232.0/24 | 256 | APNIC | AU | 3rd Aug 2011 |
| 103.10.244.0/22 | 1k | APNIC | JP | 4th Aug 2011 |
| 103.10.40.0/22 | 1k | APNIC | MY | 23rd May 2011 |
| 103.10.57.0/24 | 256 | APNIC | MY | 19th Jul 2023 |
| 103.100.0.0/22 | 1k | APNIC | CN | 31st Aug 2017 |
| 103.100.116.0/22 | 1k | APNIC | CN | 6th Sept 2017 |
| 103.100.138.0/23 | 512 | APNIC | HK | 8th Sept 2017 |
| 103.100.144.0/22 | 1k | APNIC | CN | 8th Sept 2017 |
| 103.100.164.0/22 | 1k | APNIC |  TW | 8th Sept 2017 |
| 103.100.194.0/24 | 256 | APNIC | AU | 12th Sept 2017 |
| 103.100.195.0/24 | 256 | APNIC | ID | 12th Sept 2017 |
| 103.100.236.0/22 | 1k | APNIC | CN | 13th Sept 2017 |
| 103.100.240.0/22 | 1k | APNIC | CN | 13th Sept 2017 |
| 103.100.248.0/22 | 1k | APNIC | CN | 14th Sept 2017 |
| 103.100.252.0/22 | 1k | APNIC | CN | 14th Sept 2017 |
| 103.100.32.0/22 | 1k | APNIC | CN | 4th Sept 2017 |
| 103.100.40.0/22 | 1k | APNIC | CN | 4th Sept 2017 |
| 103.100.46.0/23 | 512 | APNIC | MY | 5th Sept 2017 |
| 103.100.48.0/22 | 1k | APNIC | CN | 4th Sept 2017 |
| 103.100.52.0/22 | 1k | APNIC | CN | 5th Sept 2017 |