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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,755 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.11.20.0/24 | 256 | APNIC |  IN | 11th Oct 2011 |
| 103.11.200.0/22 | 1k | APNIC |  SG | 1st Nov 2011 |
| 103.11.223.0/24 | 256 | APNIC |  ID | 9th Nov 2011 |
| 103.11.224.0/22 | 1k | APNIC | IN | 2nd Nov 2011 |
| 103.11.232.0/22 | 1k | APNIC | IN | 2nd Nov 2011 |
| 103.11.252.0/22 | 1k | APNIC | ID | 4th Nov 2011 |
| 103.11.92.0/22 | 1k | APNIC |  HK | 19th Oct 2011 |
| 103.110.0.0/22 | 1k | APNIC | IN | 22nd Feb 2018 |
| 103.110.116.0/22 | 1k | APNIC |  CN | 5th Mar 2018 |
| 103.110.120.0/22 | 1k | APNIC | ID | 5th Mar 2018 |
| 103.110.124.0/23 | 512 | APNIC |  CY | 5th Mar 2018 |
| 103.110.126.0/24 | 256 | APNIC |  BD | 5th Mar 2018 |
| 103.110.152.0/22 | 1k | APNIC | CN | 7th Mar 2018 |
| 103.110.156.0/22 | 1k | APNIC | CN | 7th Mar 2018 |
| 103.110.180.0/23 | 512 | APNIC | IN | 13th Mar 2023 |
| 103.110.188.0/22 | 1k | APNIC | CN | 8th Mar 2018 |
| 103.110.192.0/23 | 512 | APNIC | BD | 8th Mar 2018 |
| 103.110.204.0/22 | 1k | APNIC | CN | 9th Mar 2018 |
| 103.110.223.0/24 | 256 | APNIC | ID | 9th Mar 2018 |
| 103.110.228.0/22 | 1k | APNIC |  KH | 9th Mar 2018 |
| 103.110.72.0/23 | 512 | APNIC | IN | 28th Feb 2018 |
| 103.110.74.0/24 | 256 | APNIC | ID | 28th Feb 2018 |
| 103.110.76.0/23 | 512 | APNIC | ID | 28th Feb 2018 |
| 103.110.82.0/24 | 256 | APNIC |  AU | 2nd Mar 2018 |
| 103.110.92.0/22 | 1k | APNIC | CN | 2nd Mar 2018 |
| 103.111.104.0/22 | 1k | APNIC | ID | 15th Mar 2018 |
| 103.111.125.0/24 | 256 | APNIC | ID | 16th Mar 2018 |
| 103.111.128.0/22 | 1k | APNIC | IN | 16th Mar 2018 |
| 103.111.140.0/22 | 1k | APNIC | ID | 16th Mar 2018 |
| 103.111.148.0/22 | 1k | APNIC | ID | 16th Mar 2018 |
| 103.111.152.0/22 | 1k | APNIC | ID | 16th Mar 2018 |
| 103.111.168.0/22 | 1k | APNIC | AU | 19th Mar 2018 |
| 103.111.176.0/22 | 1k | APNIC | AU | 19th Mar 2018 |
| 103.111.220.0/22 | 1k | APNIC | ID | 20th Mar 2018 |
| 103.111.240.0/22 | 1k | APNIC |  VN | 21st Mar 2018 |
| 103.111.252.0/22 | 1k | APNIC | CN | 22nd Mar 2018 |
| 103.111.44.0/22 | 1k | APNIC | IN | 13th Mar 2018 |
| 103.111.48.0/22 | 1k | APNIC | IN | 13th Mar 2018 |
| 103.111.71.0/24 | 256 | RIPE NCC |  IR | 14th Mar 2018 |
| 103.111.87.0/24 | 256 | APNIC | AU | 16th Mar 2018 |
| 103.111.90.0/23 | 512 | APNIC | BD | 15th Mar 2018 |
| 103.112.101.0/24 | 256 | APNIC |  PG | 28th Mar 2018 |
| 103.112.108.0/22 | 1k | APNIC | CN | 29th Mar 2018 |
| 103.112.112.0/22 | 1k | APNIC | CN | 29th Mar 2018 |
| 103.112.116.0/22 | 1k | APNIC | CN | 29th Mar 2018 |
| 103.112.124.0/22 | 1k | APNIC | VN | 29th Mar 2018 |
| 103.112.132.0/22 | 1k | APNIC | VN | 2nd Apr 2018 |
| 103.112.140.0/22 | 1k | APNIC | CN | 2nd Apr 2018 |
| 103.112.196.0/22 | 1k | APNIC | ID | 4th Apr 2018 |
| 103.112.233.0/24 | 256 | APNIC | ID | 5th Apr 2018 |