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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.92.105.0/24 | 256 | APNIC |  HK | 9th May 2017 |
| 103.92.108.0/22 | 1k | APNIC |  CN | 9th May 2017 |
| 103.92.12.0/22 | 1k | APNIC | CN | 4th May 2017 |
| 103.92.124.0/22 | 1k | APNIC | CN | 10th May 2017 |
| 103.92.130.0/24 | 256 | APNIC |  VG | 10th May 2017 |
| 103.92.132.0/22 | 1k | APNIC | CN | 10th May 2017 |
| 103.92.143.0/24 | 256 | APNIC |  AU | 11th May 2017 |
| 103.92.156.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.163.0/24 | 256 | APNIC |  IN | 11th May 2017 |
| 103.92.164.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.168.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.172.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.176.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.18.0/24 | 256 | APNIC |  MY | 5th May 2017 |
| 103.92.180.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.184.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.188.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.192.0/22 | 1k | APNIC | CN | 11th May 2017 |
| 103.92.236.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.92.240.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.92.244.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.92.248.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.92.252.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.92.32.0/22 | 1k | APNIC |  VN | 5th May 2017 |
| 103.92.36.0/22 | 1k | APNIC |  ID | 5th May 2017 |
| 103.92.4.0/22 | 1k | APNIC | CN | 4th May 2017 |
| 103.92.48.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.52.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.56.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.60.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.64.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.68.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.72.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.76.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.8.0/22 | 1k | APNIC | CN | 4th May 2017 |
| 103.92.80.0/22 | 1k | APNIC | CN | 5th May 2017 |
| 103.92.86.0/24 | 256 | APNIC | CN | 8th May 2017 |
| 103.92.92.0/23 | 512 | APNIC | AU | 8th May 2017 |
| 103.93.0.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.93.142.0/23 | 512 | APNIC | CN | 22nd Feb 2023 |
| 103.93.152.0/22 | 1k | APNIC | CN | 23rd May 2017 |
| 103.93.164.0/23 | 512 | APNIC | ID | 23rd May 2017 |
| 103.93.184.0/22 | 1k | APNIC | ID | 24th May 2017 |
| 103.93.20.0/23 | 512 | APNIC | IN | 21st Feb 2023 |
| 103.93.209.0/24 | 256 | APNIC | IN | 29th May 2017 |
| 103.93.210.0/23 | 512 | APNIC | ID | 26th May 2017 |
| 103.93.238.0/24 | 256 | APNIC | ID | 30th May 2017 |
| 103.93.28.0/22 | 1k | APNIC | CN | 16th May 2017 |
| 103.93.4.0/22 | 1k | APNIC | CN | 12th May 2017 |
| 103.93.84.0/22 | 1k | APNIC | CN | 17th May 2017 |