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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.70.148.0/22 | 1k | APNIC |  CN | 29th Jul 2016 |
| 103.70.168.0/23 | 512 | APNIC |  VN | 29th Jul 2022 |
| 103.70.212.0/22 | 1k | APNIC |  HK | 3rd Aug 2016 |
| 103.70.236.0/22 | 1k | APNIC | CN | 3rd Aug 2016 |
| 103.70.252.0/22 | 1k | APNIC | CN | 4th Aug 2016 |
| 103.70.28.0/22 | 1k | APNIC | VN | 25th Jul 2016 |
| 103.70.56.0/24 | 256 | APNIC |  AU | 26th Jul 2016 |
| 103.70.69.0/24 | 256 | APNIC |  IN | 27th Jul 2016 |
| 103.70.70.0/23 | 512 | APNIC | AU | 27th Jul 2016 |
| 103.71.0.0/22 | 1k | APNIC | CN | 4th Aug 2016 |
| 103.71.116.0/22 | 1k | APNIC | IN | 9th Aug 2016 |
| 103.71.120.0/22 | 1k | APNIC | CN | 10th Aug 2016 |
| 103.71.124.0/22 | 1k | APNIC | CN | 10th Aug 2016 |
| 103.71.128.0/22 | 1k | APNIC | CN | 10th Aug 2016 |
| 103.71.140.0/22 | 1k | APNIC |  TW | 11th Aug 2016 |
| 103.71.144.0/22 | 1k | APNIC | CN | 11th Aug 2016 |
| 103.71.164.0/22 | 1k | APNIC | IN | 11th Aug 2016 |
| 103.71.184.0/22 | 1k | APNIC | VN | 12th Aug 2016 |
| 103.71.188.0/24 | 256 | APNIC |  ID | 7th Oct 2022 |
| 103.71.196.0/22 | 1k | APNIC | CN | 12th Aug 2016 |
| 103.71.236.0/22 | 1k | APNIC | HK | 15th Aug 2016 |
| 103.71.240.0/23 | 512 | APNIC | ID | 15th Aug 2016 |
| 103.71.26.0/24 | 256 | APNIC |  US | 5th Aug 2016 |
| 103.71.28.0/22 | 1k | APNIC | HK | 5th Aug 2016 |
| 103.71.36.0/22 | 1k | APNIC |  JP | 5th Aug 2016 |
| 103.71.44.0/23 | 512 | APNIC | ID | 8th Aug 2016 |
| 103.71.56.0/24 | 256 | APNIC |  NL | 8th Aug 2016 |
| 103.71.72.0/22 | 1k | APNIC | CN | 8th Aug 2016 |
| 103.71.80.0/22 | 1k | APNIC | CN | 9th Aug 2016 |
| 103.71.84.0/22 | 1k | APNIC | CN | 9th Aug 2016 |
| 103.71.88.0/22 | 1k | APNIC | CN | 9th Aug 2016 |
| 103.71.98.0/24 | 256 | APNIC | IN | 11th Aug 2016 |
| 103.72.106.0/23 | 512 | APNIC | IN | 20th Jan 2023 |
| 103.72.116.0/22 | 1k | APNIC | CN | 18th Aug 2016 |
| 103.72.12.0/22 | 1k | APNIC | CN | 16th Aug 2016 |
| 103.72.124.0/22 | 1k | APNIC | CN | 18th Aug 2016 |
| 103.72.128.0/22 | 1k | APNIC | CN | 18th Aug 2016 |
| 103.72.132.0/22 | 1k | APNIC | CN | 18th Aug 2016 |
| 103.72.140.0/22 | 1k | APNIC | IN | 18th Aug 2016 |
| 103.72.16.0/22 | 1k | APNIC | CN | 16th Aug 2016 |
| 103.72.164.0/22 | 1k | APNIC | HK | 19th Aug 2016 |
| 103.72.180.0/22 | 1k | APNIC | CN | 19th Aug 2016 |
| 103.72.184.0/22 | 1k | RIPE NCC |  SI | 19th Aug 2016 |
| 103.72.20.0/22 | 1k | APNIC | CN | 16th Aug 2016 |
| 103.72.201.0/24 | 256 | APNIC | AU | 23rd Aug 2016 |
| 103.72.224.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.72.228.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.72.236.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |
| 103.72.24.0/22 | 1k | APNIC | CN | 16th Aug 2016 |
| 103.72.240.0/22 | 1k | APNIC | CN | 23rd Aug 2016 |