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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

26,993 blocks match, ordered by prefix.

Allocated but unannounced blocks, 25351 to 25400 of 26993
Prefix	Addresses	Registry	Country	Allocated
2620:e3:4000::/48	65.5k × /64	ARIN	US	29th Oct 2015
2620:e3:8000::/48	65.5k × /64	ARIN	US	17th Apr 2012
2620:e3::/48	65.5k × /64	ARIN	US	5th Aug 2026
2620:e3:c000::/48	65.5k × /64	ARIN	US	3rd Nov 2015
2620:e4:4000::/48	65.5k × /64	ARIN	US	6th Nov 2015
2620:e4:8000::/48	65.5k × /64	ARIN	US	5th Aug 2026
2620:e4::/48	65.5k × /64	ARIN	US	3rd Jun 2010
2620:e4:c000::/48	65.5k × /64	ARIN	US	10th Nov 2015
2620:e5:8000::/48	65.5k × /64	ARIN	US	19th Apr 2012
2620:e5::/48	65.5k × /64	ARIN	US	23rd Mar 2011
2620:e5:c000::/48	65.5k × /64	ARIN	US	17th Nov 2015
2620:e6:4000::/48	65.5k × /64	ARIN	US	17th Nov 2015
2620:e6:8000::/48	65.5k × /64	ARIN	US	20th Apr 2012
2620:e6::/48	65.5k × /64	ARIN	US	12th Mar 2012
2620:e6:c000::/48	65.5k × /64	ARIN	US	19th Nov 2015
2620:e7:4000::/48	65.5k × /64	ARIN	US	20th Nov 2015
2620:e7:c000::/48	65.5k × /64	ARIN	US	20th Nov 2015
2620:e8:4000::/48	65.5k × /64	ARIN	US	22nd Dec 2025
2620:e8:8000::/48	65.5k × /64	ARIN	US	26th Apr 2012
2620:e8:c000::/48	65.5k × /64	ARIN	US	2nd Dec 2015
2620:e9:8000::/48	65.5k × /64	ARIN	US	27th Apr 2012
2620:e9::/48	65.5k × /64	ARIN	US	23rd Mar 2011
2620:e9:c000::/48	65.5k × /64	ARIN	US	2nd Dec 2015
2620:e:2000::/48	65.5k × /64	ARIN	US	16th Nov 2016
2620:e:6000::/48	65.5k × /64	ARIN	US	21st Nov 2016
2620:e:8000::/48	65.5k × /64	ARIN	US	17th Jun 2014
2620:e::/48	65.5k × /64	ARIN	US	9th Jun 2010
2620:e:c000::/48	65.5k × /64	ARIN	US	15th Nov 2012
2620:e:e000::/48	65.5k × /64	ARIN	US	28th Nov 2016
2620:ea:4000::/48	65.5k × /64	ARIN	US	9th Dec 2015
2620:ea:8000::/48	65.5k × /64	ARIN	US	3rd May 2012
2620:ea::/44	1M × /64	ARIN	US	4th Nov 2010
2620:eb:4000::/48	65.5k × /64	ARIN	US	16th Dec 2015
2620:eb:8000::/48	65.5k × /64	ARIN	US	4th May 2012
2620:eb::/48	65.5k × /64	ARIN	US	23rd Mar 2011
2620:eb:c000::/48	65.5k × /64	ARIN	US	18th Dec 2015
2620:ec:4000::/48	65.5k × /64	ARIN	US	18th Dec 2015
2620:ec:8000::/48	65.5k × /64	ARIN	US	4th May 2012
2620:ec::/48	65.5k × /64	ARIN	US	3rd Jun 2010
2620:ec:c000::/48	65.5k × /64	ARIN	US	18th Dec 2015
2620:ed::/48	65.5k × /64	ARIN	US	24th Mar 2011
2620:ee:4000::/48	65.5k × /64	ARIN	US	29th Dec 2015
2620:ee::/48	65.5k × /64	ARIN	US	5th Nov 2010
2620:ee:c000::/44	1M × /64	ARIN	US	29th Dec 2015
2620:ef:4000::/48	65.5k × /64	ARIN	US	29th Dec 2015
2620:ef:8000::/48	65.5k × /64	ARIN	US	16th May 2012
2620:ef::/48	65.5k × /64	ARIN	US	23rd Dec 2025
2620:ef:c000::/48	65.5k × /64	ARIN	US	29th Dec 2015
2620:f0:4000::/44	1M × /64	ARIN	US	30th Dec 2015
2620:f0:8000::/48	65.5k × /64	ARIN	US	20th Nov 2013