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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 22701 to 22750 of 26283
Prefix	Addresses	Registry	Country	Allocated
2606:a00::/32	4.3B × /64	ARIN	US	3rd Feb 2011
2606:a080::/32	4.3B × /64	ARIN	US	12th Oct 2015
2606:a0c0::/32	4.3B × /64	ARIN	US	3rd Jan 2022
2606:a180::/32	4.3B × /64	ARIN	US	13th Oct 2015
2606:a340::/32	4.3B × /64	ARIN	US	11th Jan 2022
2606:a380::/32	4.3B × /64	ARIN	US	8th Feb 2022
2606:a400::/32	4.3B × /64	ARIN	US	17th Sept 2010
2606:a4c0::/32	4.3B × /64	ARIN	US	14th Jan 2022
2606:a500::/32	4.3B × /64	ARIN	US	22nd Dec 2011
2606:a540::/32	4.3B × /64	ARIN	US	18th Jan 2022
2606:a580::/32	4.3B × /64	ARIN	US	16th Oct 2015
2606:a640::/32	4.3B × /64	ARIN	US	19th Jan 2022
2606:a900::/32	4.3B × /64	ARIN	US	22nd Dec 2011
2606:a980::/32	4.3B × /64	ARIN	US	19th Oct 2015
2606:aa40::/32	4.3B × /64	ARIN	US	27th Jan 2022
2606:aa80::/32	4.3B × /64	ARIN	US	19th Oct 2015
2606:ac00::/32	4.3B × /64	ARIN	US	20th Sept 2010
2606:ac0::/32	4.3B × /64	ARIN	US	16th Nov 2020
2606:ac40::/32	4.3B × /64	ARIN	US	31st Jan 2022
2606:ad80::/32	4.3B × /64	ARIN	US	23rd Oct 2015
2606:adc0::/32	4.3B × /64	ARIN	US	3rd Feb 2022
2606:b000::/32	4.3B × /64	ARIN	US	2nd Apr 2010
2606:b100::/32	4.3B × /64	ARIN	US	27th Dec 2011
2606:b140::/32	4.3B × /64	ARIN	US	11th Feb 2022
2606:b280::/32	4.3B × /64	ARIN	US	2nd Nov 2015
2606:b380::/32	4.3B × /64	ARIN	US	5th Nov 2015
2606:b3c0::/32	4.3B × /64	ARIN	US	14th Feb 2022
2606:b540::/32	4.3B × /64	ARIN	US	16th Feb 2022
2606:b680::/32	4.3B × /64	ARIN	US	16th Nov 2015
2606:b780::/32	4.3B × /64	ARIN	US	16th Nov 2015
2606:b840::/32	4.3B × /64	ARIN	US	23rd Feb 2022
2606:b880::/32	4.3B × /64	ARIN	US	17th Nov 2015
2606:b8c0::/32	4.3B × /64	ARIN	US	23rd Feb 2022
2606:b9c0::/32	4.3B × /64	ARIN	US	2nd Mar 2022
2606:ba40::/32	4.3B × /64	ARIN	US	2nd Mar 2022
2606:ba80::/32	4.3B × /64	ARIN	US	19th Nov 2015
2606:bb00::/32	4.3B × /64	ARIN	US	4th Jan 2012
2606:bb80::/32	4.3B × /64	ARIN	US	20th Nov 2015
2606:bc00::/32	4.3B × /64	ARIN	US	20th Sept 2010
2606:bc40::/32	4.3B × /64	ARIN	US	4th Mar 2022
2606:bc80::/32	4.3B × /64	ARIN	US	20th Nov 2015
2606:bcc0::/32	4.3B × /64	ARIN	US	4th Mar 2022
2606:bd40::/32	4.3B × /64	ARIN	US	4th Mar 2022
2606:bdc0::/32	4.3B × /64	ARIN	US	7th Mar 2022
2606:be40::/32	4.3B × /64	ARIN	US	8th Mar 2022
2606:bf80::/32	4.3B × /64	ARIN	US	1st Dec 2015
2606:bfc0::/32	4.3B × /64	ARIN	US	8th Mar 2022
2606:c100::/32	4.3B × /64	ARIN	US	9th Jan 2012
2606:c180::/32	4.3B × /64	ARIN	US	2nd Dec 2015
2606:c1c0::/32	4.3B × /64	ARIN	US	16th Mar 2022