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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 59.150.192.0/23 | 512 | APNIC |  KR | 8th Nov 2004 |
| 59.150.195.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.198.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.20.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.200.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.204.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.206.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.207.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.24.0/21 | 2k | APNIC | KR | 8th Nov 2004 |
| 59.150.40.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.43.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.44.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.54.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.58.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.60.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.61.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.62.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.64.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.68.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.69.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.70.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.73.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.74.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.76.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.8.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.80.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.84.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.88.0/22 | 1k | APNIC | KR | 8th Nov 2004 |
| 59.150.92.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.94.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.96.0/23 | 512 | APNIC | KR | 8th Nov 2004 |
| 59.150.98.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.150.99.0/24 | 256 | APNIC | KR | 8th Nov 2004 |
| 59.152.112.0/22 | 1k | APNIC |  CN | 26th Nov 2015 |
| 59.152.116.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.16.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.20.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.24.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.28.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.32.0/22 | 1k | APNIC | CN | 30th Dec 2015 |
| 59.152.64.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.68.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.72.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.152.76.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 59.153.132.0/22 | 1k | APNIC |  TL | 21st Oct 2015 |
| 59.153.136.0/22 | 1k | APNIC | CN | 21st Oct 2015 |
| 59.153.152.0/22 | 1k | APNIC | CN | 21st Oct 2015 |
| 59.153.172.0/22 | 1k | APNIC | CN | 21st Oct 2015 |
| 59.153.176.0/22 | 1k | APNIC | CN | 21st Oct 2015 |
| 59.153.180.0/22 | 1k | APNIC | CN | 21st Oct 2015 |