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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 200.2.16.0/21 | 2k | LACNIC |  CL | 4th Jun 1993 |
| 200.2.24.0/22 | 1k | LACNIC | CL | 4th Jun 1993 |
| 200.2.80.0/21 | 2k | LACNIC | CL | 4th Apr 1995 |
| 200.2.90.0/24 | 256 | LACNIC | CL | 3rd Aug 1995 |
| 200.2.92.0/23 | 512 | LACNIC | CL | 11th Sept 1995 |
| 200.2.94.0/23 | 512 | LACNIC | CL | 11th Sept 1995 |
| 200.2.96.0/23 | 512 | LACNIC | CL | 11th Sept 1995 |
| 200.2.98.0/24 | 256 | LACNIC | CL | 26th Oct 1995 |
| 200.2.99.0/24 | 256 | LACNIC | CL | 31st Oct 1995 |
| 200.200.0.0/16 | 65.5k | LACNIC |  BR | 17th Nov 1999 |
| 200.203.0.0/20 | 4.1k | RIPE NCC |  US | 13th Mar 2025 |
| 200.215.192.0/20 | 4.1k | LACNIC | BR | 18th Nov 1999 |
| 200.217.96.0/20 | 4.1k | APNIC |  HK | 13th Mar 2025 |
| 200.218.32.0/19 | 8.2k | LACNIC | BR | 20th Apr 2001 |
| 200.218.64.0/18 | 16.4k | LACNIC | BR | 6th Aug 2001 |
| 200.219.130.0/23 | 512 | LACNIC | BR | 30th Jul 2004 |
| 200.219.138.0/23 | 512 | LACNIC | BR | 20th Oct 2005 |
| 200.219.140.0/23 | 512 | LACNIC | BR | 20th Oct 2005 |
| 200.219.143.0/24 | 256 | LACNIC | BR | 20th Oct 2005 |
| 200.219.144.0/22 | 1k | LACNIC | BR | 13th Jun 2007 |
| 200.219.156.0/23 | 512 | LACNIC | BR | 29th Apr 2014 |
| 200.22.0.0/16 | 65.5k | LACNIC | CL | 28th Nov 1994 |
| 200.225.144.0/20 | 4.1k | APNIC | HK | 13th Mar 2025 |
| 200.229.113.0/24 | 256 | LACNIC | BR | 27th Jul 2000 |
| 200.229.116.0/22 | 1k | LACNIC | BR | 27th Jul 2000 |
| 200.229.120.0/21 | 2k | LACNIC | BR | 27th Jul 2000 |
| 200.23.104.0/24 | 256 | LACNIC |  MX | 31st Jan 1996 |
| 200.23.105.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.23.106.0/24 | 256 | LACNIC | MX | 31st Jan 1996 |
| 200.23.111.0/24 | 256 | LACNIC | MX | 29th Jun 2000 |
| 200.23.117.0/24 | 256 | LACNIC | MX | 11th Jun 2011 |
| 200.23.12.0/22 | 1k | LACNIC | MX | 1st Feb 1995 |
| 200.23.121.0/24 | 256 | LACNIC | MX | 1st Feb 1996 |
| 200.23.122.0/24 | 256 | LACNIC | MX | 1st Feb 1996 |
| 200.23.123.0/24 | 256 | LACNIC | MX | 23rd Jan 1996 |
| 200.23.124.0/24 | 256 | LACNIC | MX | 16th Jan 1996 |
| 200.23.127.0/24 | 256 | LACNIC | MX | 23rd Jan 1996 |
| 200.23.129.0/24 | 256 | LACNIC | MX | 19th Feb 2003 |
| 200.23.131.0/24 | 256 | LACNIC | MX | 31st Jan 1996 |
| 200.23.133.0/24 | 256 | LACNIC | MX | 18th Dec 1995 |
| 200.23.136.0/24 | 256 | LACNIC | MX | 18th Dec 1995 |
| 200.23.137.0/24 | 256 | LACNIC | MX | 18th Dec 1995 |
| 200.23.138.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.23.141.0/24 | 256 | LACNIC | MX | 17th Jan 1996 |
| 200.23.142.0/24 | 256 | LACNIC | MX | 31st Jan 1996 |
| 200.23.151.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.23.154.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 200.23.156.0/24 | 256 | LACNIC | MX | 26th Dec 1997 |
| 200.23.16.0/23 | 512 | LACNIC | MX | 26th Dec 1997 |
| 200.23.164.0/24 | 256 | LACNIC | MX | 2nd Oct 1996 |