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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
22,593 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 36.52.24.0/23 | 512 | APNIC |  JP | 3rd Feb 2011 |
| 39.0.0.0/24 | 256 | APNIC |  CN | 14th Apr 2011 |
| 39.0.1.0/24 | 256 | APNIC |  AU | 2nd Mar 2011 |
| 39.0.128.0/17 | 32.8k | APNIC | CN | 12th Apr 2011 |
| 39.0.16.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 39.0.2.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 39.0.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 39.0.4.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 39.0.64.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 39.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 39.109.100.0/22 | 1k | APNIC |  HK | 5th Apr 2011 |
| 39.109.105.0/24 | 256 | APNIC | HK | 5th Apr 2011 |
| 39.109.106.0/23 | 512 | APNIC | HK | 5th Apr 2011 |
| 39.109.108.0/22 | 1k | APNIC | HK | 5th Apr 2011 |
| 39.109.118.0/23 | 512 | APNIC | HK | 5th Apr 2011 |
| 39.109.120.0/23 | 512 | APNIC | HK | 5th Apr 2011 |
| 39.109.48.0/24 | 256 | APNIC | HK | 5th Apr 2011 |
| 39.109.49.0/24 | 256 | APNIC | HK | 5th Apr 2011 |
| 39.109.50.0/23 | 512 | APNIC | HK | 5th Apr 2011 |
| 39.109.52.0/24 | 256 | APNIC | HK | 5th Apr 2011 |
| 39.109.55.0/24 | 256 | APNIC | HK | 5th Apr 2011 |
| 39.109.56.0/21 | 2k | APNIC | HK | 5th Apr 2011 |
| 39.109.64.0/23 | 512 | APNIC | HK | 5th Apr 2011 |
| 39.109.98.0/23 | 512 | APNIC | HK | 5th Apr 2011 |
| 42.0.0.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 42.0.16.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.0.24.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 42.0.32.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 42.0.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.1.0.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 42.1.128.0/17 | 32.8k | APNIC | CN | 10th Mar 2011 |
| 42.1.32.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 42.1.48.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.1.56.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 42.123.0.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 42.123.128.0/17 | 32.8k | APNIC | CN | 16th Mar 2011 |
| 42.123.36.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 42.123.40.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.123.48.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 42.128.0.0/12 | 1M | APNIC | CN | 16th Feb 2011 |
| 42.156.0.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 42.156.36.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 42.156.40.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.156.48.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 42.156.64.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 42.160.0.0/12 | 1M | APNIC | CN | 16th Feb 2011 |
| 42.187.0.0/18 | 16.4k | APNIC | CN | 12th Apr 2011 |
| 42.187.112.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 42.187.64.0/19 | 8.2k | APNIC | CN | 12th Apr 2011 |
| 42.187.96.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |