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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

85,392 blocks match, ordered by prefix.

Allocated but unannounced blocks, 41451 to 41500 of 85392
Prefix	Addresses	Registry	Country	Allocated
2001:df5:b1c0::/48	65.5k × /64	APNIC	VN	9th Jun 2025
2001:df5:b200::/48	65.5k × /64	APNIC	AU	13th Oct 2016
2001:df5:b240::/48	65.5k × /64	APNIC	VN	9th Jun 2025
2001:df5:b2c0::/48	65.5k × /64	APNIC	IN	10th Jun 2025
2001:df5:b300::/48	65.5k × /64	APNIC	ID	29th Jun 2018
2001:df5:b3c0::/48	65.5k × /64	APNIC	IN	10th Jun 2025
2001:df5:b400::/48	65.5k × /64	APNIC	ID	26th Aug 2015
2001:df5:b40::/48	65.5k × /64	APNIC	ID	5th Feb 2025
2001:df5:b440::/48	65.5k × /64	APNIC	IN	10th Jun 2025
2001:df5:b480::/48	65.5k × /64	APNIC	AU	30th Dec 2020
2001:df5:b540::/48	65.5k × /64	APNIC	ID	11th Jun 2025
2001:df5:b580::/48	65.5k × /64	APNIC	HK	30th Dec 2020
2001:df5:b5c0::/48	65.5k × /64	APNIC	IN	11th Jun 2025
2001:df5:b600::/48	65.5k × /64	APNIC	NZ	13th Oct 2016
2001:df5:b640::/48	65.5k × /64	APNIC	IN	11th Jun 2025
2001:df5:b680::/48	65.5k × /64	APNIC	IN	30th Dec 2020
2001:df5:b6c0::/48	65.5k × /64	APNIC	PH	12th Jun 2025
2001:df5:b740::/48	65.5k × /64	APNIC	ID	12th Jun 2025
2001:df5:b780::/48	65.5k × /64	APNIC	ID	30th Dec 2020
2001:df5:b7c0::/48	65.5k × /64	APNIC	PK	12th Jun 2025
2001:df5:b800::/48	65.5k × /64	APNIC	HK	14th May 2014
2001:df5:b80::/48	65.5k × /64	APNIC	ID	8th Oct 2020
2001:df5:b881::/48	65.5k × /64	APNIC	TH	25th Oct 2023
2001:df5:b8c0::/48	65.5k × /64	APNIC	ID	13th Jun 2025
2001:df5:b940::/48	65.5k × /64	APNIC	ID	13th Jun 2025
2001:df5:b980::/48	65.5k × /64	APNIC	AU	3rd Jan 2021
2001:df5:ba80::/48	65.5k × /64	APNIC	IN	4th Jan 2021
2001:df5:bb00::/48	65.5k × /64	APNIC	VN	4th Jul 2018
2001:df5:bb40::/48	65.5k × /64	APNIC	IN	16th Jun 2025
2001:df5:bb80::/48	65.5k × /64	APNIC	BD	5th Jan 2021
2001:df5:bbc0::/48	65.5k × /64	APNIC	AU	16th Jun 2025
2001:df5:bc0::/48	65.5k × /64	APNIC	ID	5th Feb 2025
2001:df5:bc40::/48	65.5k × /64	APNIC	IN	16th Jun 2025
2001:df5:bc80::/48	65.5k × /64	APNIC	BD	5th Jan 2021
2001:df5:bcc0::/48	65.5k × /64	APNIC	BD	16th Jun 2025
2001:df5:bd00::/48	65.5k × /64	APNIC	BD	4th Jul 2018
2001:df5:bd40::/48	65.5k × /64	APNIC	AU	16th Jun 2025
2001:df5:bd80::/48	65.5k × /64	APNIC	BD	5th Jan 2021
2001:df5:bdc0::/48	65.5k × /64	APNIC	VN	16th Jun 2025
2001:df5:bec0::/48	65.5k × /64	APNIC	BD	18th Jun 2025
2001:df5:bf00::/48	65.5k × /64	APNIC	ID	4th Jul 2018
2001:df5:bf80::/48	65.5k × /64	APNIC	IN	6th Jan 2021
2001:df5:bfc0::/48	65.5k × /64	APNIC	ID	19th Jun 2025
2001:df5:c00::/48	65.5k × /64	APNIC	NZ	24th Jul 2015
2001:df5:c0::/48	65.5k × /64	APNIC	BD	28th Jan 2025
2001:df5:c0c0::/48	65.5k × /64	APNIC	BD	19th Jun 2025
2001:df5:c140::/48	65.5k × /64	APNIC	ID	19th Jun 2025
2001:df5:c180::/48	65.5k × /64	APNIC	BD	7th Jan 2021
2001:df5:c1c0::/48	65.5k × /64	APNIC	VN	19th Jun 2025
2001:df5:c200::/48	65.5k × /64	APNIC	VN	17th Oct 2016