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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.78.172.0/22 | 1k | APNIC |  CN | 7th Nov 2016 |
| 103.78.176.0/22 | 1k | APNIC | CN | 7th Nov 2016 |
| 103.78.196.0/22 | 1k | APNIC | CN | 8th Nov 2016 |
| 103.78.232.0/22 | 1k | APNIC |  ID | 9th Nov 2016 |
| 103.78.240.0/24 | 256 | APNIC | ID | 21st Oct 2022 |
| 103.78.4.0/23 | 512 | APNIC |  VN | 12th Sept 2023 |
| 103.78.56.0/22 | 1k | APNIC | CN | 31st Oct 2016 |
| 103.78.64.0/22 | 1k | APNIC | CN | 31st Oct 2016 |
| 103.78.68.0/22 | 1k | APNIC | CN | 31st Oct 2016 |
| 103.78.88.0/22 | 1k | APNIC | VN | 1st Nov 2016 |
| 103.79.110.0/23 | 512 | APNIC |  PH | 17th Nov 2016 |
| 103.79.130.0/23 | 512 | APNIC | ID | 31st Jan 2023 |
| 103.79.136.0/22 | 1k | APNIC | CN | 18th Nov 2016 |
| 103.79.144.0/22 | 1k | APNIC | VN | 18th Nov 2016 |
| 103.79.148.0/22 | 1k | APNIC |  SG | 18th Nov 2016 |
| 103.79.158.0/24 | 256 | APNIC |  IN | 18th Nov 2016 |
| 103.79.176.0/23 | 512 | APNIC |  JP | 1st May 2023 |
| 103.79.188.0/22 | 1k | APNIC | CN | 21st Nov 2016 |
| 103.79.192.0/22 | 1k | APNIC | CN | 21st Nov 2016 |
| 103.79.196.0/22 | 1k | APNIC | CN | 21st Nov 2016 |
| 103.79.20.0/24 | 256 | APNIC |  AU | 11th Nov 2016 |
| 103.79.204.0/22 | 1k | APNIC | CN | 21st Nov 2016 |
| 103.79.208.0/22 | 1k | APNIC | CN | 21st Nov 2016 |
| 103.79.21.0/24 | 256 | APNIC | IN | 11th Nov 2016 |
| 103.79.212.0/22 | 1k | APNIC | CN | 21st Nov 2016 |
| 103.79.28.0/22 | 1k | APNIC | CN | 11th Nov 2016 |
| 103.79.36.0/22 | 1k | APNIC | CN | 11th Nov 2016 |
| 103.79.40.0/22 | 1k | APNIC | CN | 11th Nov 2016 |
| 103.79.44.0/22 | 1k | APNIC | CN | 11th Nov 2016 |
| 103.79.56.0/22 | 1k | APNIC | CN | 14th Nov 2016 |
| 103.79.60.0/22 | 1k | APNIC | CN | 14th Nov 2016 |
| 103.79.64.0/22 | 1k | APNIC | CN | 14th Nov 2016 |
| 103.79.68.0/22 | 1k | APNIC | CN | 14th Nov 2016 |
| 103.79.80.0/22 | 1k | APNIC | CN | 15th Nov 2016 |
| 103.79.84.0/22 | 1k | APNIC | CN | 15th Nov 2016 |
| 103.79.97.0/24 | 256 | APNIC | IN | 16th Nov 2016 |
| 103.8.0.0/22 | 1k | APNIC | CN | 23rd Jun 2016 |
| 103.8.108.0/22 | 1k | APNIC | CN | 18th Apr 2012 |
| 103.8.122.0/24 | 256 | APNIC | ID | 26th Apr 2012 |
| 103.8.123.0/24 | 256 | APNIC | IN | 26th Apr 2012 |
| 103.8.13.0/24 | 256 | APNIC | VN | 12th Apr 2012 |
| 103.8.152.0/22 | 1k | APNIC | SG | 23rd Apr 2012 |
| 103.8.156.0/22 | 1k | APNIC | CN | 24th Apr 2012 |
| 103.8.168.0/22 | 1k | APNIC | AU | 24th Apr 2012 |
| 103.8.200.0/22 | 1k | APNIC | CN | 26th Apr 2012 |
| 103.8.204.0/22 | 1k | APNIC | CN | 27th Apr 2012 |
| 103.8.239.0/24 | 256 | ARIN |  US | 14th Mar 2022 |
| 103.8.240.0/22 | 1k | APNIC |  KH | 1st May 2012 |
| 103.8.244.0/22 | 1k | APNIC | ID | 2nd May 2012 |
| 103.8.4.0/22 | 1k | APNIC | CN | 10th Apr 2012 |