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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Unannounced blocks in United States

26,283 blocks match, ordered by prefix.

Allocated but unannounced blocks, 22401 to 22450 of 26283
Prefix	Addresses	Registry	Country	Allocated
2605:bdc0::/32	4.3B × /64	ARIN	US	20th Apr 2020
2605:be40::/32	4.3B × /64	ARIN	US	20th Apr 2020
2605:be80::/32	4.3B × /64	ARIN	US	3rd Nov 2014
2605:bf40::/32	4.3B × /64	ARIN	US	21st Apr 2020
2605:bfc0::/32	4.3B × /64	ARIN	US	21st Apr 2020
2605:c040::/32	4.3B × /64	ARIN	US	21st Apr 2020
2605:c0c0::/32	4.3B × /64	ARIN	US	23rd Apr 2020
2605:c180::/36	268M × /64	ARIN	US	5th Nov 2014
2605:c200::/32	4.3B × /64	ARIN	US	26th Jan 2011
2605:c280::/32	4.3B × /64	ARIN	US	6th Nov 2014
2605:c2c0::/32	4.3B × /64	ARIN	US	4th May 2020
2605:c300::/32	4.3B × /64	ARIN	US	17th Aug 2011
2605:c40::/32	4.3B × /64	ARIN	US	26th Nov 2018
2605:c440::/32	4.3B × /64	ARIN	US	11th May 2020
2605:c480::/32	4.3B × /64	ARIN	US	11th Nov 2014
2605:c5c0::/32	4.3B × /64	ARIN	US	15th May 2020
2605:c600::/32	4.3B × /64	ARIN	US	26th Jan 2011
2605:c680::/32	4.3B × /64	ARIN	US	13th Nov 2014
2605:c7c0::/32	4.3B × /64	ARIN	US	22nd May 2020
2605:c8c0::/32	4.3B × /64	ARIN	US	27th May 2020
2605:ca40::/32	4.3B × /64	ARIN	US	28th May 2020
2605:cb00::/32	4.3B × /64	ARIN	US	22nd Aug 2011
2605:cc00::/32	4.3B × /64	ARIN	US	23rd Aug 2010
2605:cc0::/32	4.3B × /64	ARIN	US	11th Feb 2026
2605:cd80::/32	4.3B × /64	ARIN	US	18th Nov 2014
2605:cec0::/32	4.3B × /64	ARIN	US	5th Jun 2020
2605:cfc0::/32	4.3B × /64	ARIN	US	10th Jun 2020
2605:d0c0::/32	4.3B × /64	ARIN	US	11th Jun 2020
2605:d140::/32	4.3B × /64	ARIN	US	11th Jun 2020
2605:d180::/32	4.3B × /64	ARIN	US	25th Nov 2014
2605:d1c0::/32	4.3B × /64	ARIN	US	15th Jun 2020
2605:d280::/32	4.3B × /64	ARIN	US	26th Nov 2014
2605:d300::/32	4.3B × /64	ARIN	US	25th Aug 2011
2605:d3c0::/32	4.3B × /64	ARIN	US	19th Jun 2020
2605:d400::/32	4.3B × /64	ARIN	US	8th Apr 2026
2605:d40::/32	4.3B × /64	ARIN	US	26th Nov 2018
2605:d440::/32	4.3B × /64	ARIN	US	24th Jun 2020
2605:d5c0::/32	4.3B × /64	ARIN	US	29th Jun 2020
2605:d700::/32	4.3B × /64	ARIN	US	26th Aug 2011
2605:d740::/32	4.3B × /64	ARIN	US	2nd Jul 2020
2605:d7c0::/32	4.3B × /64	ARIN	US	10th Apr 2026
2605:d80::/32	4.3B × /64	ARIN	US	11th Oct 2013
2605:d900::/32	4.3B × /64	ARIN	US	29th Aug 2011
2605:d940::/32	4.3B × /64	ARIN	US	13th Jul 2020
2605:d980::/32	4.3B × /64	ARIN	US	15th Dec 2014
2605:da40::/32	4.3B × /64	ARIN	US	17th Jul 2020
2605:dac0::/32	4.3B × /64	ARIN	US	20th Jul 2020
2605:dc00::/32	4.3B × /64	ARIN	US	25th Aug 2010
2605:dc80::/32	4.3B × /64	ARIN	US	22nd Dec 2014
2605:dd80::/32	4.3B × /64	ARIN	US	23rd Dec 2014