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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,481 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:f940::/32 | 4.3B × /64 | LACNIC |  SX | 22nd Dec 2015 |
| 2803:f980::/32 | 4.3B × /64 | LACNIC |  CL | 1st Jul 2014 |
| 2803:f9a0::/32 | 4.3B × /64 | LACNIC |  AR | 16th Nov 2018 |
| 2803:f9d0::/32 | 4.3B × /64 | LACNIC |  CO | 9th Jul 2025 |
| 2803:fa00::/32 | 4.3B × /64 | LACNIC |  BO | 30th Jul 2012 |
| 2803:fa0::/32 | 4.3B × /64 | LACNIC | AR | 1st Mar 2019 |
| 2803:fa20::/32 | 4.3B × /64 | LACNIC | AR | 30th Oct 2017 |
| 2803:fa40::/32 | 4.3B × /64 | LACNIC |  SV | 27th Aug 2015 |
| 2803:fa60::/32 | 4.3B × /64 | LACNIC |  VE | 7th Jun 2019 |
| 2803:faa0::/32 | 4.3B × /64 | LACNIC | AR | 15th Aug 2018 |
| 2803:fac0::/32 | 4.3B × /64 | LACNIC | AR | 31st Jan 2017 |
| 2803:fad0::/32 | 4.3B × /64 | LACNIC |  DO | 8th Apr 2025 |
| 2803:fb10::/32 | 4.3B × /64 | LACNIC | VE | 18th Mar 2022 |
| 2803:fb30::/32 | 4.3B × /64 | LACNIC |  PY | 27th Aug 2026 |
| 2803:fb40::/32 | 4.3B × /64 | LACNIC |  CR | 9th Jun 2016 |
| 2803:fb50::/32 | 4.3B × /64 | LACNIC |  EC | 4th Sept 2024 |
| 2803:fb80::/32 | 4.3B × /64 | LACNIC | AR | 12th Nov 2014 |
| 2803:fba0::/32 | 4.3B × /64 | LACNIC | AR | 8th Feb 2019 |
| 2803:fc00::/32 | 4.3B × /64 | LACNIC | PY | 20th Aug 2014 |
| 2803:fc0::/32 | 4.3B × /64 | LACNIC | EC | 20th Jul 2017 |
| 2803:fc20::/32 | 4.3B × /64 | LACNIC | EC | 5th Oct 2017 |
| 2803:fc30::/32 | 4.3B × /64 | LACNIC | CO | 26th Feb 2026 |
| 2803:fc60::/32 | 4.3B × /64 | LACNIC | AR | 17th May 2019 |
| 2803:fc80::/32 | 4.3B × /64 | LACNIC | AR | 9th Jan 2014 |
| 2803:fcc0::/32 | 4.3B × /64 | LACNIC | CL | 5th Dec 2016 |
| 2803:fcd0::/32 | 4.3B × /64 | LACNIC | CO | 6th Feb 2025 |
| 2803:fce0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jan 2020 |
| 2803:fd10::/32 | 4.3B × /64 | LACNIC |  GT | 21st Jan 2022 |
| 2803:fd20::/32 | 4.3B × /64 | LACNIC | DO | 25th Jan 2018 |
| 2803:fd50::/32 | 4.3B × /64 | LACNIC | AR | 12th Jul 2024 |
| 2803:fda0::/32 | 4.3B × /64 | LACNIC | CL | 28th Dec 2018 |
| 2803:fe0::/32 | 4.3B × /64 | LACNIC | AR | 31st Aug 2020 |
| 2803:fe20::/32 | 4.3B × /64 | LACNIC | AR | 23rd Nov 2017 |
| 2803:fe40::/32 | 4.3B × /64 | LACNIC | CR | 16th Oct 2015 |
| 2803:fe80::/32 | 4.3B × /64 | LACNIC |  PE | 19th May 2014 |
| 2803:fec0::/32 | 4.3B × /64 | LACNIC | AR | 16th Mar 2017 |
| 2803:fee0::/32 | 4.3B × /64 | LACNIC | AR | 4th May 2020 |
| 2803:ff10::/32 | 4.3B × /64 | LACNIC | CO | 26th Apr 2022 |
| 2803:ff30::/32 | 4.3B × /64 | LACNIC | CO | 2nd Oct 2026 |
| 2803:ff80::/32 | 4.3B × /64 | LACNIC | CO | 26th Mar 2015 |
| 2803:ff90::/32 | 4.3B × /64 | LACNIC | AR | 21st Sept 2023 |
| 2803:ffa0::/32 | 4.3B × /64 | LACNIC | AR | 19th Mar 2019 |
| 2803:ffc0::/32 | 4.3B × /64 | LACNIC | CL | 10th Aug 2017 |
| 2804:1010::/32 | 4.3B × /64 | LACNIC |  BR | 12th Sept 2013 |
| 2804:1014::/32 | 4.3B × /64 | LACNIC | BR | 13th Sept 2013 |
| 2804:1118::/32 | 4.3B × /64 | LACNIC | BR | 7th Nov 2013 |
| 2804:1150::/32 | 4.3B × /64 | LACNIC | BR | 21st Nov 2013 |
| 2804:1154::/32 | 4.3B × /64 | LACNIC | BR | 22nd Nov 2013 |
| 2804:1160::/32 | 4.3B × /64 | LACNIC | BR | 22nd Nov 2013 |
| 2804:1190::/32 | 4.3B × /64 | LACNIC | BR | 27th Nov 2013 |