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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 157.20.78.0/23 | 512 | APNIC |  ID | 21st Feb 2024 |
| 157.227.0.0/16 | 65.5k | APNIC |  AU | 23rd Mar 1992 |
| 157.250.128.0/19 | 8.2k | APNIC |  JP | 7th Feb 1992 |
| 157.250.176.0/20 | 4.1k | APNIC | JP | 7th Feb 1992 |
| 157.250.208.0/20 | 4.1k | APNIC | JP | 7th Feb 1992 |
| 157.66.10.0/23 | 512 | APNIC |  VN | 25th Mar 2024 |
| 157.66.110.0/23 | 512 | APNIC |  IN | 16th Apr 2024 |
| 157.66.112.0/23 | 512 | APNIC | ID | 16th Apr 2024 |
| 157.66.114.0/23 | 512 | APNIC | ID | 16th Apr 2024 |
| 157.66.116.0/23 | 512 | APNIC | ID | 16th Apr 2024 |
| 157.66.126.0/23 | 512 | APNIC | ID | 17th Apr 2024 |
| 157.66.130.0/24 | 256 | APNIC | ID | 17th Apr 2024 |
| 157.66.132.0/23 | 512 | APNIC | ID | 17th Apr 2024 |
| 157.66.136.0/23 | 512 | APNIC | ID | 17th Apr 2024 |
| 157.66.148.0/23 | 512 | APNIC | IN | 19th Apr 2024 |
| 157.66.168.0/23 | 512 | APNIC | ID | 25th Apr 2024 |
| 157.66.182.0/23 | 512 | APNIC | JP | 30th Apr 2024 |
| 157.66.200.0/23 | 512 | APNIC | ID | 2nd May 2024 |
| 157.66.202.0/23 | 512 | APNIC | ID | 2nd May 2024 |
| 157.66.204.0/23 | 512 | APNIC | ID | 3rd May 2024 |
| 157.66.206.0/23 | 512 | APNIC | ID | 3rd May 2024 |
| 157.66.212.0/23 | 512 | APNIC | ID | 6th May 2024 |
| 157.66.214.0/23 | 512 | APNIC | ID | 6th May 2024 |
| 157.66.228.0/23 | 512 | APNIC | ID | 6th May 2024 |
| 157.66.230.0/23 | 512 | APNIC | ID | 7th May 2024 |
| 157.66.232.0/23 | 512 | APNIC | ID | 7th May 2024 |
| 157.66.234.0/23 | 512 | APNIC | ID | 7th May 2024 |
| 157.66.244.0/23 | 512 | APNIC |  CN | 8th May 2024 |
| 157.66.42.0/23 | 512 | APNIC | CN | 29th Mar 2024 |
| 157.66.52.0/23 | 512 | APNIC | ID | 1st Apr 2024 |
| 157.66.6.0/24 | 256 | APNIC | ID | 22nd Mar 2024 |
| 157.66.70.0/23 | 512 | APNIC | CN | 3rd Apr 2024 |
| 157.66.82.0/23 | 512 | APNIC | ID | 5th Apr 2024 |
| 157.66.88.0/23 | 512 | APNIC | CN | 9th Apr 2024 |
| 157.66.90.0/23 | 512 | APNIC | CN | 9th Apr 2024 |
| 157.66.92.0/23 | 512 | APNIC | CN | 9th Apr 2024 |
| 157.66.94.0/23 | 512 | APNIC | CN | 10th Apr 2024 |
| 157.68.0.0/16 | 65.5k | APNIC | JP | 10th Feb 1992 |
| 157.69.0.0/16 | 65.5k | APNIC | JP | 10th Feb 1992 |
| 157.70.128.0/19 | 8.2k | APNIC | JP | 10th Feb 1992 |
| 157.8.120.0/21 | 2k | APNIC | JP | 21st Apr 1993 |
| 157.8.128.0/19 | 8.2k | APNIC | JP | 21st Apr 1993 |
| 157.8.16.0/20 | 4.1k | APNIC | JP | 21st Apr 1993 |
| 157.8.160.0/22 | 1k | APNIC | JP | 21st Apr 1993 |
| 157.8.200.0/21 | 2k | APNIC | JP | 21st Apr 1993 |
| 157.8.208.0/20 | 4.1k | APNIC | JP | 21st Apr 1993 |
| 157.8.224.0/20 | 4.1k | APNIC | JP | 21st Apr 1993 |
| 157.8.240.0/22 | 1k | APNIC | JP | 21st Apr 1993 |
| 157.8.32.0/19 | 8.2k | APNIC | JP | 21st Apr 1993 |
| 157.8.64.0/20 | 4.1k | APNIC | JP | 21st Apr 1993 |