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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,580 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 157.8.8.0/21 | 2k | APNIC |  JP | 21st Apr 1993 |
| 157.8.88.0/21 | 2k | APNIC | JP | 21st Apr 1993 |
| 157.85.128.0/18 | 16.4k | APNIC |  AU | 16th Dec 1991 |
| 157.9.0.0/16 | 65.5k | APNIC | JP | 13th Apr 1993 |
| 158.120.224.0/20 | 4.1k | APNIC | AU | 28th Feb 1992 |
| 158.199.0.0/19 | 8.2k | APNIC | JP | 25th Jun 1992 |
| 158.201.128.0/18 | 16.4k | APNIC | JP | 25th Jun 1992 |
| 158.201.192.0/20 | 4.1k | APNIC | JP | 25th Jun 1992 |
| 158.204.0.0/16 | 65.5k | APNIC | JP | 26th Jun 1992 |
| 158.206.0.0/16 | 65.5k | APNIC | JP | 26th Jun 1992 |
| 158.209.0.0/16 | 65.5k | APNIC | JP | 26th Jun 1992 |
| 158.211.0.0/16 | 65.5k | APNIC | JP | 26th Jun 1992 |
| 158.212.0.0/15 | 131k | APNIC | JP | 26th Jun 1992 |
| 158.214.0.0/16 | 65.5k | APNIC | JP | 26th Jun 1992 |
| 158.60.0.0/16 | 65.5k | APNIC |  CN | 14th Feb 1992 |
| 158.79.0.0/16 | 65.5k | APNIC | CN | 17th Feb 1992 |
| 159.117.104.0/21 | 2k | APNIC |  NZ | 8th Apr 1992 |
| 159.117.112.0/20 | 4.1k | APNIC | NZ | 8th Apr 1992 |
| 159.117.128.0/22 | 1k | APNIC | NZ | 8th Apr 1992 |
| 159.117.200.0/24 | 256 | APNIC | NZ | 8th Apr 1992 |
| 159.117.220.0/23 | 512 | APNIC | NZ | 8th Apr 1992 |
| 159.117.222.0/24 | 256 | APNIC | NZ | 8th Apr 1992 |
| 159.117.223.0/24 | 256 | APNIC |  MY | 9th Apr 1992 |
| 159.117.32.0/21 | 2k | APNIC | NZ | 8th Apr 1992 |
| 159.13.128.0/18 | 16.4k | APNIC |  SG | 24th Feb 1992 |
| 159.228.0.0/16 | 65.5k | APNIC | JP | 8th Feb 2011 |
| 159.73.0.0/16 | 65.5k | APNIC | AU | 17th Mar 1992 |
| 159.80.0.0/16 | 65.5k | APNIC | JP | 20th Mar 1992 |
| 160.14.0.0/16 | 65.5k | APNIC | JP | 10th Jun 1992 |
| 160.187.104.0/23 | 512 | APNIC |  VN | 23rd Sept 2024 |
| 160.187.12.0/23 | 512 | APNIC |  PK | 6th Sept 2024 |
| 160.187.126.0/23 | 512 | APNIC | PK | 25th Sept 2024 |
| 160.187.172.0/23 | 512 | APNIC | AU | 4th Oct 2024 |
| 160.187.208.0/23 | 512 | APNIC |  IN | 8th Oct 2024 |
| 160.187.214.0/24 | 256 | APNIC | NZ | 9th Oct 2024 |
| 160.187.223.0/24 | 256 | APNIC | CN | 9th Oct 2024 |
| 160.187.224.0/23 | 512 | APNIC | JP | 9th Oct 2024 |
| 160.187.233.0/24 | 256 | APNIC |  ID | 14th Oct 2024 |
| 160.187.242.0/23 | 512 | APNIC | VN | 10th Oct 2024 |
| 160.187.244.0/23 | 512 | APNIC | VN | 10th Oct 2024 |
| 160.187.252.0/23 | 512 | APNIC | CN | 11th Oct 2024 |
| 160.187.254.0/23 | 512 | APNIC | CN | 11th Oct 2024 |
| 160.187.31.0/24 | 256 | APNIC | IN | 13th Sept 2024 |
| 160.187.44.0/23 | 512 | APNIC |  VU | 13th Sept 2024 |
| 160.187.46.0/23 | 512 | APNIC | IN | 13th Sept 2024 |
| 160.187.84.0/23 | 512 | APNIC | VN | 20th Sept 2024 |
| 160.187.88.0/23 | 512 | APNIC | VN | 20th Sept 2024 |
| 160.187.90.0/23 | 512 | APNIC | VN | 20th Sept 2024 |
| 160.188.0.0/16 | 65.5k | APNIC | JP | 26th Jun 1992 |
| 160.19.150.0/23 | 512 | APNIC | VN | 14th May 2024 |