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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,356 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 218.100.14.0/24 | 256 | APNIC |  VN | 25th Nov 2003 |
| 218.100.16.0/23 | 512 | APNIC |  HK | 14th Jan 2004 |
| 218.100.19.0/24 | 256 | APNIC |  AU | 2nd Apr 2004 |
| 218.100.2.0/23 | 512 | APNIC | AU | 19th Nov 2002 |
| 218.100.21.0/24 | 256 | APNIC |  NZ | 9th Nov 2004 |
| 218.100.22.0/24 | 256 | APNIC |  MY | 7th Feb 2005 |
| 218.100.25.0/24 | 256 | APNIC | NZ | 31st Mar 2005 |
| 218.100.27.0/24 | 256 | APNIC |  ID | 6th Sept 2005 |
| 218.100.28.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.29.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.30.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.31.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.32.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.33.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.34.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.35.0/24 | 256 | APNIC | ID | 7th Sept 2005 |
| 218.100.36.0/24 | 256 | APNIC | AU | 23rd Sept 2005 |
| 218.100.38.0/24 | 256 | APNIC |  TH | 9th Mar 2006 |
| 218.100.39.0/24 | 256 | APNIC | AU | 15th Mar 2006 |
| 218.100.4.0/24 | 256 | APNIC | ID | 8th May 2003 |
| 218.100.40.0/24 | 256 | APNIC | AU | 30th May 2006 |
| 218.100.41.0/24 | 256 | APNIC | ID | 7th Jun 2006 |
| 218.100.42.0/24 | 256 | APNIC |  JP | 14th Jun 2006 |
| 218.100.44.0/24 | 256 | APNIC | MY | 12th Dec 2006 |
| 218.100.48.0/23 | 512 | APNIC |  IN | 26th Sept 2007 |
| 218.100.5.0/24 | 256 | APNIC | JP | 9th Jul 2003 |
| 218.100.50.0/24 | 256 | APNIC | AU | 19th Nov 2007 |
| 218.100.52.0/23 | 512 | APNIC | AU | 3rd Mar 2008 |
| 218.100.54.0/24 | 256 | APNIC | AU | 3rd Mar 2008 |
| 218.100.55.0/24 | 256 | APNIC | ID | 20th Mar 2008 |
| 218.100.56.0/24 | 256 | APNIC | NZ | 15th Jul 2008 |
| 218.100.57.0/24 | 256 | APNIC |  LK | 5th Aug 2008 |
| 218.100.58.0/24 | 256 | APNIC | MY | 27th Aug 2008 |
| 218.100.61.0/24 | 256 | APNIC | LK | 23rd Oct 2008 |
| 218.100.62.0/23 | 512 | APNIC | ID | 3rd Nov 2008 |
| 218.100.64.0/24 | 256 | APNIC | ID | 3rd Nov 2008 |
| 218.100.65.0/24 | 256 | APNIC | NZ | 23rd Dec 2008 |
| 218.100.66.0/24 | 256 | APNIC | TH | 18th Feb 2009 |
| 218.100.67.0/24 | 256 | APNIC | JP | 11th Nov 2009 |
| 218.100.69.0/24 | 256 | APNIC | MY | 11th Jan 2010 |
| 218.100.72.0/23 | 512 | APNIC | ID | 29th Jul 2010 |
| 218.100.74.0/24 | 256 | APNIC | ID | 31st Aug 2010 |
| 218.100.76.0/24 | 256 | APNIC | AU | 15th Nov 2010 |
| 218.100.78.0/24 | 256 | APNIC | AU | 6th Jan 2011 |
| 218.100.8.0/24 | 256 | APNIC | JP | 15th Aug 2003 |
| 218.100.85.0/24 | 256 | APNIC |  PK | 26th Jan 2011 |
| 218.100.9.0/24 | 256 | APNIC | JP | 15th Aug 2003 |
| 218.100.96.0/19 | 8.2k | APNIC |  CN | 12th Apr 2011 |
| 218.185.0.0/17 | 32.8k | APNIC | AU | 25th Oct 2001 |
| 218.185.192.0/19 | 8.2k | APNIC | CN | 19th Oct 2004 |