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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
85,310 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 200.34.132.0/24 | 256 | LACNIC |  MX | 20th Oct 1996 |
| 200.34.133.0/24 | 256 | LACNIC | MX | 20th Oct 1996 |
| 200.34.135.0/24 | 256 | LACNIC | MX | 25th Oct 1996 |
| 200.34.136.0/23 | 512 | LACNIC | MX | 30th Oct 1996 |
| 200.34.138.0/24 | 256 | LACNIC | MX | 31st Oct 1996 |
| 200.34.139.0/24 | 256 | LACNIC | MX | 31st Oct 1996 |
| 200.34.143.0/24 | 256 | LACNIC | MX | 5th Nov 1996 |
| 200.34.144.0/23 | 512 | LACNIC | MX | 5th Nov 1996 |
| 200.34.146.0/23 | 512 | LACNIC | MX | 5th Nov 1996 |
| 200.34.148.0/24 | 256 | LACNIC | MX | 7th Nov 1996 |
| 200.34.149.0/24 | 256 | LACNIC | MX | 11th Nov 1996 |
| 200.34.150.0/24 | 256 | LACNIC | MX | 11th Nov 1996 |
| 200.34.151.0/24 | 256 | LACNIC | MX | 8th Nov 1996 |
| 200.34.156.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.34.157.0/24 | 256 | LACNIC | MX | 9th Sept 1998 |
| 200.34.158.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.34.159.0/24 | 256 | LACNIC | MX | 19th Jan 1997 |
| 200.34.172.0/24 | 256 | LACNIC | MX | 11th Jun 2011 |
| 200.34.192.0/24 | 256 | LACNIC | MX | 26th Nov 1996 |
| 200.34.193.0/24 | 256 | LACNIC | MX | 12th Dec 1996 |
| 200.34.195.0/24 | 256 | LACNIC | MX | 2nd Dec 1996 |
| 200.34.196.0/23 | 512 | LACNIC | MX | 28th Nov 1996 |
| 200.34.198.0/24 | 256 | LACNIC | MX | 2nd Dec 1996 |
| 200.34.199.0/24 | 256 | LACNIC | MX | 2nd Dec 1996 |
| 200.34.20.0/23 | 512 | LACNIC | MX | 16th Oct 1996 |
| 200.34.204.0/24 | 256 | LACNIC | MX | 13th Nov 1996 |
| 200.34.207.0/24 | 256 | LACNIC | MX | 17th Nov 1996 |
| 200.34.208.0/23 | 512 | LACNIC | MX | 17th Nov 1996 |
| 200.34.211.0/24 | 256 | LACNIC | MX | 19th Nov 1996 |
| 200.34.212.0/24 | 256 | LACNIC | MX | 20th Nov 1996 |
| 200.34.213.0/24 | 256 | LACNIC | MX | 24th Nov 1996 |
| 200.34.214.0/24 | 256 | LACNIC | MX | 26th Nov 1996 |
| 200.34.223.0/24 | 256 | LACNIC | MX | 26th Nov 1996 |
| 200.34.24.0/22 | 1k | LACNIC | MX | 31st Jul 1996 |
| 200.34.28.0/24 | 256 | LACNIC | MX | 31st Jul 1996 |
| 200.34.29.0/24 | 256 | LACNIC | MX | 26th Nov 1996 |
| 200.34.30.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 200.34.52.0/23 | 512 | LACNIC | MX | 8th Sept 1996 |
| 200.34.54.0/23 | 512 | LACNIC | MX | 23rd Jun 1997 |
| 200.34.56.0/22 | 1k | LACNIC | MX | 29th Oct 1996 |
| 200.34.60.0/24 | 256 | LACNIC | MX | 16th Oct 1996 |
| 200.34.62.0/24 | 256 | LACNIC | MX | 16th Oct 1996 |
| 200.34.63.0/24 | 256 | LACNIC | MX | 17th Oct 1996 |
| 200.35.192.0/19 | 8.2k | LACNIC |  VE | 13th Jul 2004 |
| 200.35.224.0/20 | 4.1k | LACNIC | VE | 4th Nov 2004 |
| 200.35.240.0/20 | 4.1k | LACNIC | VE | 4th Jul 2006 |
| 200.36.64.0/19 | 8.2k | LACNIC | MX | 8th Sept 1997 |
| 200.4.11.0/24 | 256 | LACNIC | MX | 23rd May 1995 |
| 200.4.12.0/23 | 512 | LACNIC | MX | 31st May 1995 |
| 200.4.14.0/23 | 512 | LACNIC | MX | 14th Jun 1995 |