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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.

Unannounced blocks in United States

27,034 blocks match, ordered by prefix.

Allocated but unannounced blocks, 15701 to 15750 of 27034
PrefixAddressesRegistryCountryAllocated
204.126.220.0/23512ARINUS15th Mar 1995
204.126.226.0/23512ARINUS17th Mar 1995
204.126.228.0/23512ARINUS17th Mar 1995
204.126.232.0/23512ARINUS22nd Mar 1995
204.126.234.0/23512ARINUS24th Mar 1995
204.126.238.0/23512ARINUS5th Apr 1995
204.126.24.0/23512ARINUS27th Apr 2020
204.126.242.0/23512ARINUS10th Apr 1995
204.126.244.0/23512ARINUS20th Apr 1995
204.126.246.0/23512ARINUS21st Apr 1995
204.126.250.0/23512ARINUS24th Apr 1995
204.126.254.0/23512ARINUS9th Jul 2025
204.126.28.0/23512ARINUS25th Oct 1994
204.126.30.0/23512ARINUS25th Oct 1994
204.126.32.0/204.1kARINUS19th Aug 1994
204.126.4.0/23512ARINUS27th Sept 1994
204.126.48.0/212kARINUS19th Aug 1994
204.126.56.0/221kARINUS19th Aug 1994
204.126.60.0/23512ARINUS19th Aug 1994
204.126.62.0/23512ARINUS25th Oct 1994
204.126.66.0/23512ARINUS26th Oct 1994
204.126.68.0/23512ARINUS26th Oct 1994
204.126.72.0/24256ARINUS26th Oct 1994
204.126.74.0/23512ARINUS2nd Nov 1994
204.126.8.0/23512ARINUS7th Oct 1994
204.126.86.0/23512ARINUS15th Nov 1994
204.126.88.0/23512ARINUS15th Nov 1994
204.126.90.0/23512ARINUS16th Nov 1994
204.126.92.0/23512ARINUS18th Nov 1994
204.126.96.0/23512ARINUS22nd Nov 1994
204.128.129.0/24256ARINUS20th Dec 1994
204.128.131.0/24256ARINUS20th Dec 1994
204.128.134.0/24256ARINUS22nd Dec 1994
204.128.135.0/24256ARINUS22nd Dec 1994
204.128.136.0/24256ARINUS22nd Dec 1994
204.128.137.0/24256ARINUS22nd Dec 1994
204.128.138.0/24256ARINUS11th Jul 1994
204.128.139.0/24256ARINUS22nd Dec 1994
204.128.140.0/24256ARINUS22nd Dec 1994
204.128.142.0/24256ARINUS22nd Dec 1994
204.128.143.0/24256ARINUS22nd Dec 1994
204.128.147.0/24256ARINUS3rd Jan 1995
204.128.148.0/24256ARINUS3rd Jan 1995
204.128.149.0/24256ARINUS3rd Jan 1995
204.128.150.0/24256ARINUS3rd Jan 1995
204.128.151.0/24256ARINUS3rd Jan 1995
204.128.152.0/24256ARINUS3rd Jan 1995
204.128.153.0/24256ARINUS2nd Jul 2026
204.128.155.0/24256ARINUS7th Jan 1995
204.128.156.0/24256ARINUS7th Jan 1995