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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,124 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a03:21e0::/32 | 4.3B × /64 | RIPE NCC | 8th Aug 2014 | |
| 2a03:2220::/32 | 4.3B × /64 | RIPE NCC | 8th Aug 2014 | |
| 2a03:2240::/32 | 4.3B × /64 | RIPE NCC | 17th Oct 2012 | |
| 2a03:2280::/32 | 4.3B × /64 | RIPE NCC | 18th Aug 2011 | |
| 2a03:22e0::/29 | 34.4B × /64 | RIPE NCC | 11th Aug 2014 | |
| 2a03:2300::/29 | 34.4B × /64 | RIPE NCC | 28th Mar 2011 | |
| 2a03:2340::/32 | 4.3B × /64 | RIPE NCC | 19th Oct 2012 | |
| 2a03:23a0::/32 | 4.3B × /64 | RIPE NCC | 13th Aug 2014 | |
| 2a03:23c0::/32 | 4.3B × /64 | RIPE NCC | 19th Oct 2012 | |
| 2a03:23e0::/32 | 4.3B × /64 | RIPE NCC | 13th Aug 2014 | |
| 2a03:24a0::/32 | 4.3B × /64 | RIPE NCC | 18th Aug 2014 | |
| 2a03:2520::/32 | 4.3B × /64 | RIPE NCC | 19th Aug 2014 | |
| 2a03:2540::/32 | 4.3B × /64 | RIPE NCC | 19th Oct 2012 | |
| 2a03:2560::/32 | 4.3B × /64 | RIPE NCC | 20th Aug 2014 | |
| 2a03:2580::/32 | 4.3B × /64 | RIPE NCC | 19th Aug 2011 | |
| 2a03:2620::/32 | 4.3B × /64 | RIPE NCC | 20th Aug 2014 | |
| 2a03:2640::/32 | 4.3B × /64 | RIPE NCC | 19th Oct 2012 | |
| 2a03:26a0::/32 | 4.3B × /64 | RIPE NCC | 21st Aug 2014 | |
| 2a03:2720::/32 | 4.3B × /64 | RIPE NCC | 21st Aug 2014 | |
| 2a03:2780::/32 | 4.3B × /64 | RIPE NCC | 22nd Aug 2011 | |
| 2a03:27c0::/32 | 4.3B × /64 | RIPE NCC | 22nd Oct 2012 | |
| 2a03:2820::/32 | 4.3B × /64 | RIPE NCC | 22nd Aug 2014 | |
| 2a03:2840::/32 | 4.3B × /64 | RIPE NCC | 22nd Oct 2012 | |
| 2a03:28c0::/32 | 4.3B × /64 | RIPE NCC | 22nd Oct 2012 | |
| 2a03:28e0::/29 | 34.4B × /64 | RIPE NCC | 25th Aug 2014 | |
| 2a03:2920::/32 | 4.3B × /64 | RIPE NCC | 25th Aug 2014 | |
| 2a03:2940::/32 | 4.3B × /64 | RIPE NCC | 22nd Oct 2012 | |
| 2a03:29a0::/32 | 4.3B × /64 | RIPE NCC | 25th Aug 2014 | |
| 2a03:29e0::/32 | 4.3B × /64 | RIPE NCC | 26th Aug 2014 | |
| 2a03:2a0::/29 | 34.4B × /64 | RIPE NCC | 30th Jun 2014 | |
| 2a03:2a40::/32 | 4.3B × /64 | RIPE NCC | 23rd Oct 2012 | |
| 2a03:2ac0::/32 | 4.3B × /64 | RIPE NCC | 23rd Oct 2012 | |
| 2a03:2ae0::/32 | 4.3B × /64 | RIPE NCC | 12th Jan 2016 | |
| 2a03:2b60::/32 | 4.3B × /64 | RIPE NCC | 27th Aug 2014 | |
| 2a03:2bc0::/29 | 34.4B × /64 | RIPE NCC | 10th Sept 2025 | |
| 2a03:2d00::/32 | 4.3B × /64 | RIPE NCC | 29th Mar 2011 | |
| 2a03:2d40::/32 | 4.3B × /64 | RIPE NCC | 19th Aug 2015 | |
| 2a03:2d60::/32 | 4.3B × /64 | RIPE NCC | 2nd Sept 2014 | |
| 2a03:2d80::/32 | 4.3B × /64 | RIPE NCC | 23rd Aug 2011 | |
| 2a03:2e00::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2011 | |
| 2a03:2e20::/32 | 4.3B × /64 | RIPE NCC | 3rd Sept 2014 | |
| 2a03:2e40::/32 | 4.3B × /64 | RIPE NCC | 25th Oct 2012 | |
| 2a03:2e60::/32 | 4.3B × /64 | RIPE NCC | 3rd Sept 2014 | |
| 2a03:2e80::/29 | 34.4B × /64 | RIPE NCC | 31st Dec 2018 | |
| 2a03:2ee0::/32 | 4.3B × /64 | RIPE NCC | 4th Sept 2014 | |
| 2a03:2f20::/32 | 4.3B × /64 | RIPE NCC | 4th Sept 2014 | |
| 2a03:2f40::/32 | 4.3B × /64 | RIPE NCC | 25th Oct 2012 | |
| 2a03:2f60::/32 | 4.3B × /64 | RIPE NCC | 5th Sept 2014 | |
| 2a03:2fa0::/32 | 4.3B × /64 | RIPE NCC | 5th Sept 2014 | |
| 2a03:2fc0::/32 | 4.3B × /64 | RIPE NCC | 25th Oct 2012 |