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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,580 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 163.53.164.0/22 | 1k | APNIC |  CN | 10th Jul 2014 |
| 163.53.172.0/22 | 1k | APNIC | CN | 10th Jul 2014 |
| 163.53.188.0/22 | 1k | APNIC | CN | 11th Jul 2014 |
| 163.53.228.0/22 | 1k | APNIC |  AU | 14th Jul 2014 |
| 163.53.232.0/22 | 1k | APNIC | AU | 14th Jul 2014 |
| 163.53.240.0/22 | 1k | APNIC | CN | 14th Jul 2014 |
| 163.53.36.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.4.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 163.53.40.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.48.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.52.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.56.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.64.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.53.68.0/22 | 1k | APNIC | AU | 9th Jul 2014 |
| 163.53.8.0/22 | 1k | APNIC | CN | 8th Jul 2014 |
| 163.53.96.0/22 | 1k | APNIC | CN | 9th Jul 2014 |
| 163.56.0.0/16 | 65.5k | APNIC |  JP | 24th Jul 1992 |
| 163.60.0.0/16 | 65.5k | APNIC | JP | 24th Jul 1992 |
| 163.61.116.0/24 | 256 | APNIC |  SG | 12th Feb 2025 |
| 163.61.158.0/24 | 256 | APNIC |  ID | 19th Feb 2025 |
| 163.61.160.128/26 | 64 | APNIC |  LA | 25th Jul 2025 |
| 163.61.160.64/26 | 64 | APNIC |  BD | 17th Apr 2025 |
| 163.61.161.0/26 | 64 | APNIC |  HK | 8th Sept 2025 |
| 163.61.161.64/26 | 64 | APNIC |  PH | 7th Jul 2026 |
| 163.61.210.0/23 | 512 | APNIC | ID | 21st Feb 2025 |
| 163.61.218.0/23 | 512 | APNIC | ID | 23rd Feb 2025 |
| 163.61.242.0/23 | 512 | APNIC |  VN | 26th Feb 2025 |
| 163.61.246.0/24 | 256 | APNIC |  US | 27th Feb 2025 |
| 163.61.254.0/24 | 256 | APNIC | ID | 3rd Mar 2025 |
| 163.61.255.0/24 | 256 | APNIC | PH | 4th Mar 2025 |
| 163.61.37.0/24 | 256 | APNIC | JP | 2nd Feb 2025 |
| 163.61.56.0/23 | 512 | APNIC | ID | 5th Feb 2025 |
| 163.61.59.0/24 | 256 | APNIC |  IN | 6th Feb 2025 |
| 163.61.68.0/23 | 512 | APNIC | VN | 6th Feb 2025 |
| 163.61.76.0/24 | 256 | APNIC | ID | 6th Feb 2025 |
| 165.101.0.0/22 | 1k | APNIC | JP | 11th May 1993 |
| 165.101.138.0/23 | 512 | APNIC | IN | 4th Jul 2025 |
| 165.101.144.0/23 | 512 | APNIC | CN | 7th Jul 2025 |
| 165.101.158.0/23 | 512 | APNIC | VN | 9th Jul 2025 |
| 165.101.163.0/24 | 256 | APNIC | IN | 10th Jul 2025 |
| 165.101.170.0/23 | 512 | APNIC | CN | 10th Jul 2025 |
| 165.101.178.0/24 | 256 | APNIC | AU | 10th Jul 2025 |
| 165.101.202.0/23 | 512 | APNIC | ID | 15th Jul 2025 |
| 165.101.244.0/23 | 512 | APNIC | CN | 22nd Jul 2025 |
| 165.101.31.0/24 | 256 | APNIC | ID | 19th Jun 2025 |
| 165.101.34.0/23 | 512 | APNIC | VN | 19th Jun 2025 |
| 165.101.36.0/23 | 512 | APNIC | VN | 19th Jun 2025 |
| 165.101.4.0/23 | 512 | APNIC | CN | 13th Jun 2025 |
| 165.101.44.0/23 | 512 | APNIC | VN | 19th Jun 2025 |
| 165.101.48.0/24 | 256 | APNIC |  MM | 20th Jun 2025 |