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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,906 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.210.114.0/23 | 512 | APNIC |  PH | 30th Aug 2022 |
| 103.210.156.0/22 | 1k | APNIC |  CN | 3rd Mar 2016 |
| 103.210.164.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 103.210.172.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 103.210.176.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 103.210.180.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 103.210.184.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 103.210.188.0/22 | 1k | APNIC | CN | 3rd Mar 2016 |
| 103.210.194.0/23 | 512 | APNIC |  AU | 3rd Mar 2016 |
| 103.210.209.0/24 | 256 | APNIC |  ID | 8th Mar 2023 |
| 103.210.216.0/22 | 1k | APNIC | CN | 4th Mar 2016 |
| 103.210.223.0/24 | 256 | APNIC | AU | 7th Mar 2016 |
| 103.210.228.0/22 | 1k | APNIC | ID | 4th Mar 2016 |
| 103.210.248.0/23 | 512 | APNIC | AU | 7th Mar 2016 |
| 103.210.251.0/24 | 256 | APNIC | AU | 9th Mar 2016 |
| 103.210.40.0/22 | 1k | APNIC |  IN | 25th Feb 2016 |
| 103.210.70.0/23 | 512 | APNIC | ID | 26th May 2023 |
| 103.210.96.0/22 | 1k | APNIC | CN | 29th Feb 2016 |
| 103.211.128.0/22 | 1k | APNIC | IN | 15th Mar 2016 |
| 103.211.156.0/22 | 1k | APNIC | CN | 16th Mar 2016 |
| 103.211.164.0/22 | 1k | APNIC | CN | 17th Mar 2016 |
| 103.211.173.0/24 | 256 | APNIC |  HK | 17th Mar 2016 |
| 103.211.196.0/24 | 256 | APNIC | ID | 9th Mar 2023 |
| 103.211.224.0/22 | 1k | APNIC | CN | 21st Mar 2016 |
| 103.211.248.0/22 | 1k | APNIC | CN | 22nd Mar 2016 |
| 103.211.48.0/24 | 256 | APNIC | AU | 10th Mar 2016 |
| 103.211.96.0/22 | 1k | APNIC | CN | 14th Mar 2016 |
| 103.212.100.0/22 | 1k | APNIC | CN | 30th Mar 2016 |
| 103.212.148.0/22 | 1k | APNIC | CN | 30th Mar 2016 |
| 103.212.164.0/22 | 1k | APNIC | CN | 31st Mar 2016 |
| 103.212.172.0/23 | 512 | APNIC | IN | 1st Jun 2023 |
| 103.212.174.0/23 | 512 | APNIC | IN | 1st Jun 2023 |
| 103.212.176.0/24 | 256 | APNIC |  MY | 31st Mar 2016 |
| 103.212.184.0/24 | 256 | APNIC | IN | 1st Jun 2023 |
| 103.212.188.0/22 | 1k | APNIC |  JP | 31st Mar 2016 |
| 103.212.196.0/22 | 1k | APNIC | CN | 31st Mar 2016 |
| 103.212.200.0/22 | 1k | APNIC | CN | 31st Mar 2016 |
| 103.212.233.0/24 | 256 | APNIC | ID | 1st Apr 2016 |
| 103.212.248.0/22 | 1k | APNIC |  KR | 1st Apr 2016 |
| 103.212.252.0/22 | 1k | APNIC | CN | 1st Apr 2016 |
| 103.212.44.0/22 | 1k | APNIC | CN | 28th Mar 2016 |
| 103.212.8.0/22 | 1k | APNIC | CN | 22nd Mar 2016 |
| 103.212.82.0/24 | 256 | RIPE NCC |  NL | 29th Mar 2016 |
| 103.212.84.0/22 | 1k | APNIC | CN | 29th Mar 2016 |
| 103.213.12.0/23 | 512 | APNIC |  VN | 28th Sept 2023 |
| 103.213.136.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 103.213.140.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 103.213.152.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 103.213.156.0/22 | 1k | APNIC | CN | 4th Apr 2016 |
| 103.213.16.0/21 | 2k | APNIC | IN | 1st Apr 2016 |