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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.218.204.0/22 | 1k | APNIC |  CN | 13th May 2016 |
| 103.218.208.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 103.218.212.0/22 | 1k | APNIC | CN | 13th May 2016 |
| 103.218.232.0/22 | 1k | APNIC |  IN | 13th May 2016 |
| 103.218.244.0/22 | 1k | APNIC | IN | 13th May 2016 |
| 103.218.248.0/22 | 1k | APNIC | IN | 13th May 2016 |
| 103.218.28.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.32.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.36.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.40.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.44.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.48.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.52.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.56.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.60.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.64.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.68.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.72.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.76.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.8.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.80.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.84.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.88.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.218.92.0/22 | 1k | APNIC | CN | 11th May 2016 |
| 103.219.147.0/24 | 256 | APNIC |  BD | 20th May 2016 |
| 103.219.24.0/22 | 1k | APNIC | CN | 16th May 2016 |
| 103.219.253.0/24 | 256 | APNIC | IN | 25th May 2016 |
| 103.219.254.0/23 | 512 | APNIC |  ID | 24th May 2016 |
| 103.219.48.0/21 | 2k | APNIC | IN | 16th May 2016 |
| 103.219.64.0/22 | 1k | APNIC | CN | 17th May 2016 |
| 103.219.77.0/24 | 256 | APNIC |  US | 17th May 2016 |
| 103.219.84.0/22 | 1k | APNIC | CN | 18th May 2016 |
| 103.219.88.0/22 | 1k | APNIC | CN | 18th May 2016 |
| 103.219.96.0/22 | 1k | APNIC | CN | 18th May 2016 |
| 103.22.0.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.100.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.104.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.108.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.112.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.116.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.12.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.120.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.124.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.128.0/22 | 1k | APNIC |  HK | 15th Jun 2011 |
| 103.22.132.0/22 | 1k | APNIC | ID | 15th Jun 2011 |
| 103.22.16.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.164.0/23 | 512 | APNIC | ID | 20th Jun 2011 |
| 103.22.20.0/22 | 1k | APNIC | CN | 5th Aug 2011 |
| 103.22.212.0/22 | 1k | APNIC |  TW | 11th Aug 2016 |
| 103.22.218.0/23 | 512 | APNIC |  VN | 21st Oct 2022 |