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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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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 |
|---|---|---|---|---|
| 103.12.167.0/24 | 256 | APNIC |  ID | 17th Jul 2012 |
| 103.12.188.0/22 | 1k | APNIC |  AU | 16th Jul 2012 |
| 103.12.22.0/24 | 256 | APNIC | AU | 31st May 2012 |
| 103.12.220.0/22 | 1k | APNIC | ID | 18th Jul 2012 |
| 103.12.23.0/24 | 256 | APNIC | ID | 1st Jun 2012 |
| 103.12.244.0/24 | 256 | APNIC |  IN | 28th Jul 2022 |
| 103.12.32.0/22 | 1k | APNIC |  CN | 4th Jun 2012 |
| 103.12.82.0/23 | 512 | APNIC |  BD | 21st Jun 2012 |
| 103.12.92.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 103.120.100.0/22 | 1k | APNIC | CN | 2nd Aug 2018 |
| 103.120.109.0/24 | 256 | APNIC |  HK | 3rd Aug 2018 |
| 103.120.137.0/24 | 256 | APNIC | AU | 6th Aug 2018 |
| 103.120.140.0/22 | 1k | APNIC | CN | 6th Aug 2018 |
| 103.120.144.0/22 | 1k | APNIC | BD | 6th Aug 2018 |
| 103.120.148.0/22 | 1k | APNIC |  TW | 6th Aug 2018 |
| 103.120.156.0/22 | 1k | APNIC |  VN | 7th Aug 2018 |
| 103.120.196.0/22 | 1k | APNIC | CN | 8th Aug 2018 |
| 103.120.219.0/24 | 256 | APNIC | AU | 9th Aug 2018 |
| 103.120.224.0/22 | 1k | APNIC | CN | 9th Aug 2018 |
| 103.120.24.0/22 | 1k | APNIC | HK | 30th Jul 2018 |
| 103.120.247.0/24 | 256 | APNIC |  SG | 13th Aug 2018 |
| 103.120.41.0/24 | 256 | APNIC | SG | 31st Jul 2018 |
| 103.120.52.0/22 | 1k | APNIC | CN | 31st Jul 2018 |
| 103.120.77.0/24 | 256 | APNIC | AU | 2nd Aug 2018 |
| 103.120.78.0/23 | 512 | APNIC | VN | 10th Aug 2022 |
| 103.120.96.0/22 | 1k | APNIC | CN | 1st Aug 2018 |
| 103.121.112.0/23 | 512 | APNIC | IN | 21st Aug 2018 |
| 103.121.160.0/22 | 1k | APNIC | CN | 26th Aug 2018 |
| 103.121.186.0/23 | 512 | APNIC | ID | 28th Mar 2023 |
| 103.121.200.0/22 | 1k | APNIC | ID | 29th Aug 2018 |
| 103.121.251.0/24 | 256 | APNIC | ID | 31st Aug 2018 |
| 103.121.252.0/22 | 1k | APNIC | CN | 31st Aug 2018 |
| 103.121.28.0/22 | 1k | APNIC |  PK | 14th Aug 2018 |
| 103.121.50.0/23 | 512 | APNIC | ID | 16th Aug 2018 |
| 103.121.80.0/22 | 1k | APNIC |  PH | 20th Aug 2018 |
| 103.121.84.0/22 | 1k | APNIC | ID | 20th Aug 2018 |
| 103.122.120.0/24 | 256 | APNIC | AU | 17th Sept 2018 |
| 103.122.148.0/22 | 1k | APNIC | TW | 18th Sept 2018 |
| 103.122.165.0/24 | 256 | APNIC |  PG | 28th Dec 2022 |
| 103.122.166.0/23 | 512 | APNIC | AU | 19th Sept 2018 |
| 103.122.192.0/22 | 1k | APNIC | CN | 19th Sept 2018 |
| 103.122.196.0/22 | 1k | APNIC | TW | 19th Sept 2018 |
| 103.122.20.0/22 | 1k | APNIC | HK | 10th Sept 2018 |
| 103.122.236.0/22 | 1k | APNIC | TW | 20th Sept 2018 |
| 103.122.240.0/22 | 1k | APNIC | CN | 20th Sept 2018 |
| 103.122.7.0/24 | 256 | APNIC | ID | 7th Sept 2018 |
| 103.122.76.0/23 | 512 | APNIC | ID | 13th Sept 2018 |
| 103.122.78.0/24 | 256 | APNIC | IN | 13th Sept 2018 |
| 103.122.80.0/23 | 512 | APNIC | IN | 28th Mar 2023 |
| 103.122.86.0/23 | 512 | APNIC | IN | 13th Sept 2018 |