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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,248 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2620:0:ee0::/48 | 65.5k × /64 | ARIN | 25th Feb 2009 | |
| 2620:0:ef0::/48 | 65.5k × /64 | ARIN | 26th Feb 2009 | |
| 2620:100:3000::/40 | 16.8M × /64 | ARIN | 1st Oct 2010 | |
| 2620:100:7000::/44 | 1M × /64 | ARIN | 19th Oct 2010 | |
| 2620:100:c000::/42 | 4.2M × /64 | ARIN | 23rd Nov 2010 | |
| 2620:100:d000::/44 | 1M × /64 | ARIN | 6th Dec 2010 | |
| 2620:100:f000::/44 | 1M × /64 | ARIN | 13th Dec 2010 | |
| 2620:101:5000::/42 | 4.2M × /64 | ARIN | 26th Jan 2011 | |
| 2620:101:6000::/47 | 131k × /64 | ARIN | 28th Jan 2011 | |
| 2620:101:7000::/47 | 131k × /64 | ARIN | 31st Jan 2011 | |
| 2620:101:d000::/45 | 524k × /64 | ARIN | 10th Feb 2011 | |
| 2620:102:3000::/44 | 1M × /64 | ARIN | 16th Feb 2011 | |
| 2620:102:5000::/43 | 2.1M × /64 | ARIN | 23rd Feb 2011 | |
| 2620:102:6000::/46 | 262k × /64 | ARIN | 23rd Feb 2011 | |
| 2620:102:8000::/44 | 1M × /64 | ARIN | 2nd Mar 2011 | |
| 2620:102:9000::/40 | 16.8M × /64 | ARIN | 4th Mar 2011 | |
| 2620:102::/44 | 1M × /64 | ARIN | 11th Feb 2011 | |
| 2620:102:b000::/47 | 131k × /64 | ARIN | 7th Mar 2011 | |
| 2620:102:c000::/45 | 524k × /64 | ARIN | 15th Mar 2011 | |
| 2620:102:d000::/41 | 8.4M × /64 | ARIN | 23rd Mar 2011 | |
| 2620:102:e000::/44 | 1M × /64 | ARIN | 23rd Mar 2011 | |
| 2620:102:f000::/46 | 262k × /64 | ARIN | 23rd Mar 2011 | |
| 2620:103:1000::/44 | 1M × /64 | ARIN | 25th Mar 2011 | |
| 2620:103:3000::/40 | 16.8M × /64 | ARIN | 4th Apr 2011 | |
| 2620:103:5000::/44 | 1M × /64 | ARIN | 6th Apr 2011 | |
| 2620:103:6000::/44 | 1M × /64 | ARIN | 7th Apr 2011 | |
| 2620:103:7000::/44 | 1M × /64 | ARIN | 12th Apr 2011 | |
| 2620:103::/45 | 524k × /64 | ARIN | 23rd Mar 2011 | |
| 2620:103:b000::/44 | 1M × /64 | ARIN | 20th Apr 2011 | |
| 2620:104:3000::/44 | 1M × /64 | ARIN | 25th May 2011 | |
| 2620:104:5000::/44 | 1M × /64 | ARIN | 26th May 2011 | |
| 2620:104:9000::/44 | 1M × /64 | ARIN | 1st Jun 2011 | |
| 2620:104:d000::/40 | 16.8M × /64 | ARIN | 6th Jun 2011 | |
| 2620:104:f000::/44 | 1M × /64 | ARIN | 14th Jun 2011 | |
| 2620:105:2000::/40 | 16.8M × /64 | ARIN | 21st Jun 2011 | |
| 2620:105:3000::/44 | 1M × /64 | ARIN | 23rd Jun 2011 | |
| 2620:105:4000::/44 | 1M × /64 | ARIN | 23rd Jun 2011 | |
| 2620:105:5000::/44 | 1M × /64 | ARIN | 24th Jun 2011 | |
| 2620:105:7000::/44 | 1M × /64 | ARIN | 28th Jun 2011 | |
| 2620:105:8000::/44 | 1M × /64 | ARIN | 28th Jun 2011 | |
| 2620:105:9000::/40 | 16.8M × /64 | ARIN | 28th Jun 2011 | |
| 2620:105::/44 | 1M × /64 | ARIN | 15th Jun 2011 | |
| 2620:105:a000::/44 | 1M × /64 | ARIN | 5th Jul 2011 | |
| 2620:105:e000::/40 | 16.8M × /64 | ARIN | 14th Jul 2011 | |
| 2620:106:1000::/40 | 16.8M × /64 | ARIN | 20th Jul 2011 | |
| 2620:106:4000::/44 | 1M × /64 | ARIN | 1st Aug 2011 | |
| 2620:106:5000::/40 | 16.8M × /64 | ARIN | 1st Aug 2011 | |
| 2620:106:9000::/44 | 1M × /64 | ARIN | 22nd Aug 2011 | |
| 2620:106::/44 | 1M × /64 | ARIN | 20th Jul 2011 | |
| 2620:106:b000::/44 | 1M × /64 | ARIN | 24th Aug 2011 |