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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with the most unannounced blocks, largest first.

Unannounced blocks

85,458 blocks match, ordered by prefix.

Allocated but unannounced blocks, 41951 to 42000 of 85458
Prefix	Addresses	Registry	Country	Allocated
2001:df6:5740::/48	65.5k × /64	APNIC	ID	20th Nov 2025
2001:df6:5780::/48	65.5k × /64	APNIC	HK	25th Mar 2021
2001:df6:57c0::/48	65.5k × /64	APNIC	ID	20th Nov 2025
2001:df6:5800::/48	65.5k × /64	APNIC	IN	4th Jun 2014
2001:df6:5840::/48	65.5k × /64	APNIC	IN	20th Nov 2025
2001:df6:5880::/48	65.5k × /64	APNIC	AU	26th Mar 2021
2001:df6:58c0::/48	65.5k × /64	APNIC	BD	21st Nov 2025
2001:df6:5900::/48	65.5k × /64	APNIC	ID	30th Aug 2018
2001:df6:5940::/48	65.5k × /64	APNIC	BD	21st Nov 2025
2001:df6:5941::/48	65.5k × /64	APNIC	BD	19th Dec 2025
2001:df6:5a00::/48	65.5k × /64	APNIC	ID	9th Nov 2016
2001:df6:5a40::/48	65.5k × /64	APNIC	PK	24th Nov 2025
2001:df6:5a80::/48	65.5k × /64	APNIC	MN	29th Mar 2021
2001:df6:5ac0::/48	65.5k × /64	APNIC	BD	24th Nov 2025
2001:df6:5b00::/48	65.5k × /64	APNIC	AU	31st Aug 2018
2001:df6:5b40::/48	65.5k × /64	APNIC	VN	24th Nov 2025
2001:df6:5b80::/48	65.5k × /64	APNIC	BD	29th Mar 2021
2001:df6:5bc0::/48	65.5k × /64	APNIC	ID	24th Nov 2025
2001:df6:5c0::/48	65.5k × /64	APNIC	IN	22nd Aug 2025
2001:df6:5c80::/48	65.5k × /64	APNIC	BD	29th Mar 2021
2001:df6:5cc0::/48	65.5k × /64	APNIC	ID	25th Nov 2025
2001:df6:5d00::/48	65.5k × /64	APNIC	CN	31st Aug 2018
2001:df6:5d40::/48	65.5k × /64	APNIC	IN	25th Nov 2025
2001:df6:5d80::/48	65.5k × /64	APNIC	AU	30th Mar 2021
2001:df6:5dc0::/48	65.5k × /64	APNIC	ID	26th Nov 2025
2001:df6:5e40::/48	65.5k × /64	APNIC	ID	26th Nov 2025
2001:df6:5ec0::/48	65.5k × /64	APNIC	AU	27th Nov 2025
2001:df6:5f00::/48	65.5k × /64	APNIC	ID	31st Aug 2018
2001:df6:5f40::/48	65.5k × /64	APNIC	BD	27th Nov 2025
2001:df6:5fc0::/48	65.5k × /64	APNIC	JP	30th Nov 2025
2001:df6:6000::/48	65.5k × /64	APNIC	JP	9th Jul 2013
2001:df6:6040::/48	65.5k × /64	APNIC	PK	1st Dec 2025
2001:df6:6080::/48	65.5k × /64	APNIC	IN	30th Mar 2021
2001:df6:60c0::/48	65.5k × /64	APNIC	VN	1st Dec 2025
2001:df6:6140::/48	65.5k × /64	APNIC	ID	2nd Dec 2025
2001:df6:61c0::/48	65.5k × /64	APNIC	ID	2nd Dec 2025
2001:df6:6280::/48	65.5k × /64	APNIC	HK	30th Mar 2021
2001:df6:6340::/48	65.5k × /64	APNIC	ID	3rd Dec 2025
2001:df6:6380::/48	65.5k × /64	APNIC	IN	31st Mar 2021
2001:df6:63c0::/48	65.5k × /64	APNIC	ID	3rd Dec 2025
2001:df6:6400::/48	65.5k × /64	APNIC	SG	30th Sept 2015
2001:df6:6480::/48	65.5k × /64	APNIC	BD	31st Mar 2021
2001:df6:64c0::/48	65.5k × /64	APNIC	ID	3rd Dec 2025
2001:df6:6540::/48	65.5k × /64	APNIC	ID	4th Dec 2025
2001:df6:65c0::/48	65.5k × /64	APNIC	IN	4th Dec 2025
2001:df6:6600::/48	65.5k × /64	APNIC	AU	11th Nov 2016
2001:df6:6640::/48	65.5k × /64	APNIC	ID	4th Dec 2025
2001:df6:6680::/48	65.5k × /64	APNIC	AU	1st Apr 2021
2001:df6:66c0::/48	65.5k × /64	APNIC	ID	5th Dec 2025
2001:df6:6700::/48	65.5k × /64	APNIC	ID	4th Sept 2018