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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.41.160.0/22 | 1k | APNIC |  CN | 21st Oct 2014 |
| 103.41.180.0/22 | 1k | APNIC |  HK | 22nd Oct 2014 |
| 103.41.184.0/22 | 1k | APNIC | HK | 22nd Oct 2014 |
| 103.41.220.0/22 | 1k | APNIC | CN | 23rd Oct 2014 |
| 103.41.224.0/22 | 1k | APNIC | CN | 23rd Oct 2014 |
| 103.41.228.0/22 | 1k | APNIC | CN | 24th Oct 2014 |
| 103.41.236.0/22 | 1k | APNIC |  IN | 24th Oct 2014 |
| 103.41.40.0/22 | 1k | APNIC | IN | 13th Oct 2014 |
| 103.41.52.0/22 | 1k | APNIC | CN | 14th Oct 2014 |
| 103.42.112.0/23 | 512 | APNIC |  TW | 5th Nov 2014 |
| 103.42.114.0/24 | 256 | APNIC | IN | 6th Nov 2014 |
| 103.42.12.0/23 | 512 | APNIC | IN | 22nd Nov 2022 |
| 103.42.190.0/24 | 256 | APNIC |  NZ | 11th Nov 2014 |
| 103.42.230.0/23 | 512 | APNIC |  GB | 28th Nov 2022 |
| 103.42.232.0/22 | 1k | APNIC | CN | 13th Nov 2014 |
| 103.42.24.0/22 | 1k | APNIC | CN | 28th Oct 2014 |
| 103.42.244.0/23 | 512 | APNIC |  ID | 4th Sept 2023 |
| 103.42.32.0/22 | 1k | APNIC | CN | 29th Oct 2014 |
| 103.42.44.0/22 | 1k | APNIC |  JP | 30th Oct 2014 |
| 103.42.64.0/22 | 1k | APNIC | CN | 31st Oct 2014 |
| 103.42.68.0/22 | 1k | APNIC | CN | 31st Oct 2014 |
| 103.42.8.0/22 | 1k | APNIC | CN | 28th Oct 2014 |
| 103.43.100.0/22 | 1k | APNIC | CN | 20th Nov 2014 |
| 103.43.104.0/22 | 1k | APNIC | CN | 20th Nov 2014 |
| 103.43.124.0/22 | 1k | APNIC | CN | 21st Nov 2014 |
| 103.43.137.0/24 | 256 | APNIC |  AU | 24th Nov 2014 |
| 103.43.152.0/22 | 1k | ARIN |  US | 13th Mar 2024 |
| 103.43.177.0/24 | 256 | APNIC | AU | 26th Nov 2014 |
| 103.43.192.0/22 | 1k | APNIC | CN | 25th Nov 2014 |
| 103.43.196.0/22 | 1k | APNIC | CN | 25th Nov 2014 |
| 103.43.200.0/22 | 1k | APNIC | IN | 25th Nov 2014 |
| 103.43.208.0/22 | 1k | APNIC | CN | 26th Nov 2014 |
| 103.43.216.0/22 | 1k | APNIC | HK | 26th Nov 2014 |
| 103.43.220.0/22 | 1k | APNIC | CN | 26th Nov 2014 |
| 103.43.224.0/22 | 1k | APNIC | CN | 26th Nov 2014 |
| 103.43.24.0/23 | 512 | APNIC | ID | 28th Nov 2022 |
| 103.43.26.0/23 | 512 | APNIC | ID | 28th Nov 2022 |
| 103.43.4.0/22 | 1k | APNIC | IN | 14th Nov 2014 |
| 103.43.66.0/23 | 512 | APNIC | ID | 20th Nov 2014 |
| 103.43.96.0/22 | 1k | APNIC | CN | 20th Nov 2014 |
| 103.44.101.0/24 | 256 | APNIC | AU | 5th Dec 2014 |
| 103.44.108.0/24 | 256 | APNIC |  MY | 5th Dec 2014 |
| 103.44.112.0/22 | 1k | APNIC |  SG | 5th Dec 2014 |
| 103.44.120.0/22 | 1k | APNIC | CN | 8th Dec 2014 |
| 103.44.124.0/22 | 1k | APNIC | CN | 8th Dec 2014 |
| 103.44.176.0/22 | 1k | APNIC | CN | 10th Dec 2014 |
| 103.44.180.0/22 | 1k | APNIC | CN | 10th Dec 2014 |
| 103.44.184.0/22 | 1k | APNIC | CN | 10th Dec 2014 |
| 103.44.188.0/22 | 1k | APNIC | CN | 10th Dec 2014 |
| 103.44.192.0/22 | 1k | APNIC | CN | 10th Dec 2014 |