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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.231.198.0/23 | 512 | APNIC |  ID | 16th May 2014 |
| 103.231.20.0/22 | 1k | APNIC |  CN | 8th May 2014 |
| 103.231.216.0/22 | 1k | APNIC |  IN | 19th May 2014 |
| 103.231.220.0/23 | 512 | APNIC |  SG | 20th May 2014 |
| 103.231.24.0/23 | 512 | APNIC | IN | 7th Sept 2022 |
| 103.231.244.0/22 | 1k | APNIC | CN | 21st May 2014 |
| 103.231.250.0/24 | 256 | APNIC | SG | 22nd May 2014 |
| 103.231.27.0/24 | 256 | APNIC |  GB | 9th May 2014 |
| 103.232.0.0/22 | 1k | APNIC |  HK | 21st May 2014 |
| 103.232.132.0/22 | 1k | APNIC |  AU | 29th May 2014 |
| 103.232.170.0/23 | 512 | APNIC | AU | 30th May 2014 |
| 103.232.176.0/22 | 1k | APNIC | IN | 30th May 2014 |
| 103.232.188.0/22 | 1k | APNIC | CN | 11th Aug 2016 |
| 103.232.30.0/24 | 256 | APNIC | ID | 23rd May 2014 |
| 103.232.36.0/22 | 1k | APNIC | HK | 26th May 2014 |
| 103.232.4.0/22 | 1k | APNIC | CN | 21st May 2014 |
| 103.232.44.0/22 | 1k | RIPE NCC |  NL | 26th May 2014 |
| 103.232.68.0/22 | 1k | APNIC | HK | 27th May 2014 |
| 103.232.96.0/22 | 1k | APNIC | AU | 27th May 2014 |
| 103.233.104.0/22 | 1k | APNIC | CN | 9th Jun 2014 |
| 103.233.120.0/24 | 256 | APNIC | IN | 10th Jun 2014 |
| 103.233.16.0/22 | 1k | APNIC | AU | 4th Jun 2014 |
| 103.233.180.0/23 | 512 | APNIC |  MY | 12th Jun 2014 |
| 103.233.212.0/22 | 1k | APNIC |  KH | 13th Sept 2016 |
| 103.233.228.0/22 | 1k | APNIC | CN | 13th Jun 2014 |
| 103.233.242.0/24 | 256 | APNIC | AU | 16th Jun 2014 |
| 103.233.28.0/23 | 512 | APNIC | AU | 4th Jun 2014 |
| 103.233.44.0/22 | 1k | APNIC | CN | 5th Jun 2014 |
| 103.233.90.0/23 | 512 | APNIC | ID | 7th Jun 2014 |
| 103.234.0.0/22 | 1k | APNIC | CN | 16th Jun 2014 |
| 103.234.100.0/22 | 1k | APNIC | MY | 20th Jun 2014 |
| 103.234.14.0/23 | 512 | APNIC | AU | 18th Jun 2014 |
| 103.234.163.0/24 | 256 | APNIC | AU | 25th Jun 2014 |
| 103.234.172.0/22 | 1k | APNIC | CN | 24th Jun 2014 |
| 103.234.180.0/22 | 1k | APNIC | CN | 24th Jun 2014 |
| 103.234.190.0/24 | 256 | APNIC | SG | 6th Jul 2023 |
| 103.234.220.0/22 | 1k | APNIC | HK | 25th Jun 2014 |
| 103.234.244.0/22 | 1k | APNIC | CN | 27th Jun 2014 |
| 103.234.248.0/22 | 1k | APNIC | AU | 30th Jun 2014 |
| 103.234.64.0/22 | 1k | APNIC | IN | 18th Jun 2014 |
| 103.234.72.0/22 | 1k | APNIC | HK | 11th Aug 2016 |
| 103.235.132.0/22 | 1k | APNIC | CN | 4th Jul 2014 |
| 103.235.140.0/22 | 1k | APNIC | CN | 4th Jul 2014 |
| 103.235.148.0/22 | 1k | APNIC | CN | 4th Jul 2014 |
| 103.235.154.0/24 | 256 | APNIC | AU | 9th Jul 2014 |
| 103.235.156.0/22 | 1k | APNIC | IN | 4th Jul 2014 |
| 103.235.180.0/24 | 256 | APNIC |  JP | 7th Jul 2023 |
| 103.235.184.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 103.235.192.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 103.235.200.0/22 | 1k | APNIC | CN | 9th Jul 2014 |