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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,310 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 200.4.32.0/20 | 4.1k | LACNIC |  MX | 9th May 1995 |
| 200.4.52.0/24 | 256 | LACNIC | MX | 20th Jun 1995 |
| 200.4.53.0/24 | 256 | LACNIC | MX | 29th Aug 1995 |
| 200.4.54.0/24 | 256 | LACNIC | MX | 29th Aug 1995 |
| 200.4.55.0/24 | 256 | LACNIC | MX | 11th Sept 1995 |
| 200.4.58.0/24 | 256 | LACNIC | MX | 22nd Nov 1995 |
| 200.4.60.0/22 | 1k | LACNIC | MX | 22nd Nov 1995 |
| 200.4.64.0/22 | 1k | LACNIC | MX | 20th Jun 1995 |
| 200.4.72.0/21 | 2k | LACNIC | MX | 31st Oct 1995 |
| 200.4.9.0/24 | 256 | LACNIC | MX | 9th May 1995 |
| 200.47.208.0/21 | 2k | LACNIC |  AR | 15th Nov 2013 |
| 200.47.220.0/22 | 1k | LACNIC | AR | 15th Nov 2013 |
| 200.49.16.0/21 | 2k | LACNIC |  CL | 30th Jun 2006 |
| 200.5.10.0/24 | 256 | LACNIC | AR | 8th Apr 2010 |
| 200.5.11.0/24 | 256 | ARIN |  PR | 31st Aug 1995 |
| 200.5.8.0/24 | 256 | ARIN | PR | 15th May 1995 |
| 200.5.9.0/24 | 256 | LACNIC |  BR | 19th May 2015 |
| 200.50.195.0/24 | 256 | LACNIC | BR | 4th Mar 2020 |
| 200.6.0.0/24 | 256 | LACNIC |  EC | 29th Jan 1993 |
| 200.6.1.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.11.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.12.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.15.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.16.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.19.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.2.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.20.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.21.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.22.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.23.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.24.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.25.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.26.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.28.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.29.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.3.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.30.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.31.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.32.0/24 | 256 | LACNIC | EC | 2nd Feb 1993 |
| 200.6.33.0/24 | 256 | LACNIC | CL | 8th Feb 1993 |
| 200.6.4.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.5.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.6.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.64.0/24 | 256 | LACNIC | CL | 27th Jan 1993 |
| 200.6.68.0/22 | 1k | LACNIC | CL | 27th Jan 1993 |
| 200.6.7.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.6.84.0/22 | 1k | LACNIC | BR | 19th May 2020 |
| 200.6.9.0/24 | 256 | LACNIC | EC | 29th Jan 1993 |
| 200.61.252.0/24 | 256 | LACNIC |  VE | 2nd Sept 2011 |
| 200.61.253.0/24 | 256 | LACNIC |  CW | 7th Sept 2011 |