SUBNET.IM

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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through AFRINIC, largest first.

Unannounced blocks in Tanzania

62 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1 to 50 of 62
PrefixAddressesRegistryCountryAllocated
102.201.171.0/24256AFRINICTZ11th Aug 2026
102.202.104.0/221kAFRINICTZ18th May 2026
102.202.221.0/24256AFRINICTZ8th Apr 2026
102.202.88.0/221kAFRINICTZ20th May 2026
102.203.113.0/24256AFRINICTZ5th Feb 2026
102.204.122.0/24256AFRINICTZ9th Oct 2025
102.205.200.0/221kAFRINICTZ27th Jun 2025
102.207.146.0/23512AFRINICTZ2nd Oct 2024
102.214.32.0/221kAFRINICTZ23rd Nov 2022
154.126.224.0/198.2kAFRINICTZ28th Feb 2014
196.223.5.0/24256AFRINICTZ11th Jun 2007
196.223.6.0/24256AFRINICTZ29th Jun 2007
196.49.50.0/24256AFRINICTZ23rd Mar 2018
196.60.0.0/24256AFRINICTZ30th May 2016
196.60.48.0/24256AFRINICTZ23rd Mar 2018
196.60.50.0/24256AFRINICTZ8th Jun 2018
196.60.52.0/24256AFRINICTZ8th Jun 2018
197.152.0.0/1665.5kAFRINICTZ18th May 2012
197.215.240.0/204.1kAFRINICTZ30th Apr 2013
197.234.224.0/221kAFRINICTZ7th Dec 2012
2001:43f8:1390::/4865.5k × /64AFRINICTZ30th Apr 2019
2001:43f8:2::/4865.5k × /64AFRINICTZ3rd Mar 2015
2001:43f8:4::/4865.5k × /64AFRINICTZ26th Mar 2018
2001:43f8:610::/4865.5k × /64AFRINICTZ9th Feb 2012
2001:43f8:611::/4865.5k × /64AFRINICTZ14th Jun 2017
2001:43f8::/4865.5k × /64AFRINICTZ11th Jul 2007
2001:43f8:ce0::/4865.5k × /64AFRINICTZ13th Mar 2017
2001:43fc:2000::/4865.5k × /64AFRINICTZ8th Sept 2021
2001:43fd:6800::/4865.5k × /64AFRINICTZ17th Apr 2026
2001:43fe:b000::/4865.5k × /64AFRINICTZ7th Apr 2024
2001:43ff:2000::/4865.5k × /64AFRINICTZ19th Nov 2021
2001:43ff:e800::/4865.5k × /64AFRINICTZ17th Jul 2026
2c0f:120::/324.3B × /64AFRINICTZ13th Nov 2025
2c0f:18c0::/324.3B × /64AFRINICTZ25th Apr 2025
2c0f:1bc0::/324.3B × /64AFRINICTZ26th Jun 2025
2c0f:1cc0::/324.3B × /64AFRINICTZ26th Jun 2025
2c0f:2580::/324.3B × /64AFRINICTZ23rd Nov 2022
2c0f:280::/324.3B × /64AFRINICTZ18th Feb 2022
2c0f:31c0::/324.3B × /64AFRINICTZ2nd Sept 2025
2c0f:37c0::/324.3B × /64AFRINICTZ30th Sept 2025
2c0f:3dc0::/324.3B × /64AFRINICTZ27th Oct 2025
2c0f:4820::/324.3B × /64AFRINICTZ23rd Mar 2026
2c0f:4d20::/324.3B × /64AFRINICTZ18th May 2026
2c0f:5040::/324.3B × /64AFRINICTZ21st Jul 2023
2c0f:5cc0::/324.3B × /64AFRINICTZ26th Jun 2025
2c0f:6600::/324.3B × /64AFRINICTZ12th May 2021
2c0f:7040::/324.3B × /64AFRINICTZ13th Mar 2024
2c0f:7bc0::/324.3B × /64AFRINICTZ15th Oct 2025
2c0f:aa0::/324.3B × /64AFRINICTZ17th Apr 2026
2c0f:b80::/324.3B × /64AFRINICTZ12th Oct 2022