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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,755 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.112.246.0/23 | 512 | APNIC |  ID | 6th Apr 2018 |
| 103.112.28.0/22 | 1k | APNIC |  HK | 22nd Mar 2018 |
| 103.112.48.0/22 | 1k | APNIC |  TW | 26th Mar 2018 |
| 103.112.72.0/22 | 1k | APNIC |  CN | 27th Mar 2018 |
| 103.112.88.0/22 | 1k | APNIC | CN | 28th Mar 2018 |
| 103.112.92.0/22 | 1k | APNIC | CN | 28th Mar 2018 |
| 103.113.108.0/24 | 256 | APNIC |  IN | 11th Apr 2018 |
| 103.113.109.0/24 | 256 | APNIC |  BD | 12th Apr 2018 |
| 103.113.144.0/22 | 1k | APNIC | CN | 12th Apr 2018 |
| 103.113.166.0/23 | 512 | APNIC | ID | 8th Aug 2022 |
| 103.113.212.0/24 | 256 | APNIC | ID | 14th Dec 2022 |
| 103.113.213.0/24 | 256 | APNIC | IN | 16th Apr 2018 |
| 103.113.220.0/22 | 1k | APNIC | CN | 17th Apr 2018 |
| 103.113.232.0/22 | 1k | APNIC | CN | 18th Apr 2018 |
| 103.113.236.0/22 | 1k | APNIC | CN | 18th Apr 2018 |
| 103.113.248.0/23 | 512 | APNIC | ID | 18th Apr 2018 |
| 103.113.88.0/22 | 1k | APNIC |  VN | 11th Apr 2018 |
| 103.114.132.0/22 | 1k | APNIC | HK | 27th Apr 2018 |
| 103.114.148.0/22 | 1k | APNIC | CN | 27th Apr 2018 |
| 103.114.176.0/22 | 1k | APNIC | CN | 1st May 2018 |
| 103.114.230.0/24 | 256 | APNIC | IN | 7th May 2018 |
| 103.114.240.0/22 | 1k | APNIC | CN | 8th May 2018 |
| 103.114.28.0/22 | 1k | APNIC | CN | 23rd Apr 2018 |
| 103.114.32.0/23 | 512 | APNIC | IN | 23rd Apr 2018 |
| 103.114.4.0/22 | 1k | APNIC | CN | 19th Apr 2018 |
| 103.114.68.0/22 | 1k | APNIC | CN | 25th Apr 2018 |
| 103.114.8.0/24 | 256 | APNIC |  PH | 19th Apr 2018 |
| 103.114.9.0/24 | 256 | APNIC |  AU | 19th Apr 2018 |
| 103.115.147.0/24 | 256 | APNIC | IN | 17th May 2018 |
| 103.115.148.0/22 | 1k | APNIC | CN | 17th May 2018 |
| 103.115.165.0/24 | 256 | APNIC | AU | 18th May 2018 |
| 103.115.167.0/24 | 256 | APNIC |  NP | 21st May 2018 |
| 103.115.22.0/24 | 256 | APNIC | AU | 11th May 2018 |
| 103.115.228.0/22 | 1k | APNIC | ID | 23rd May 2018 |
| 103.115.3.0/24 | 256 | APNIC |  JP | 22nd Jun 2023 |
| 103.115.33.0/24 | 256 | APNIC | PH | 14th May 2018 |
| 103.115.35.0/24 | 256 | APNIC | ID | 16th Dec 2022 |
| 103.115.4.0/23 | 512 | APNIC |  MM | 9th May 2018 |
| 103.115.52.0/22 | 1k | APNIC | CN | 14th May 2018 |
| 103.115.68.0/22 | 1k | APNIC | CN | 14th May 2018 |
| 103.115.96.0/24 | 256 | APNIC |  GB | 15th May 2018 |
| 103.116.10.0/23 | 512 | APNIC | IN | 16th Mar 2023 |
| 103.116.128.0/22 | 1k | APNIC | CN | 31st May 2018 |
| 103.116.134.0/24 | 256 | APNIC | AU | 31st May 2018 |
| 103.116.135.0/24 | 256 | APNIC | ID | 31st May 2018 |
| 103.116.157.0/24 | 256 | APNIC | IN | 1st Jun 2018 |
| 103.116.159.0/24 | 256 | APNIC | MM | 4th Jun 2018 |
| 103.116.184.0/22 | 1k | APNIC | CN | 5th Jun 2018 |
| 103.116.194.0/24 | 256 | APNIC | MM | 5th Jun 2018 |
| 103.116.195.0/24 | 256 | APNIC | AU | 7th Jun 2018 |