u4.no Authority, Backlinks & Domain Age

31/100
authority

#404,273
global rank of 133,241,980

772
websites link to it

24 years
domain age

How strong is u4.no?

u4.no has an XKey authority of 31 out of 100, which makes it a moderately established website. It ranks #404,273 of 133,241,980 websites by how central it is to the web's links – the top 0.3%. 772 different websites link to it.

Authority comes from Common Crawl's map of links between websites (July–September 2026): a site linked from many well-linked sites scores high. Google doesn't use this number, but it tracks the kind of link strength that helps pages rank. What is domain authority?

Which websites link to u4.no?

The 50 strongest websites linking to u4.no, by link strength (0–100). Select any one to see its own report.

#	Website linking to it	Link strength
1	wikipedia.org	88
2	europa.eu	84
3	blogspot.com	82
4	squarespace.com	82
5	nih.gov	80
6	medium.com	78
7	harvard.edu	75
8	substack.com	75
9	www.gov.uk	74
10	outlook.com	74
11	tinyurl.com	74
12	mit.edu	72
13	oup.com	71
14	mdpi.com	71
15	frontiersin.org	70
16	unesco.org	70
17	canada.ca	70
18	weforum.org	70
19	deloitte.com	69
20	worldbank.org	69
21	plos.org	68
22	aljazeera.com	67
23	umn.edu	66
24	brookings.edu	65
25	over-blog.com	64
26	undp.org	63
27	google.ru	63
28	bu.edu	63
29	ourworldindata.org	63
30	georgetown.edu	63
31	cointelegraph.com	61
32	thenation.com	61
33	cfr.org	61
34	unwomen.org	60
35	deutschlandfunk.de	60
36	scielo.br	60
37	unimelb.edu.au	60
38	nationalacademies.org	60
39	csis.org	59
40	smashingmagazine.com	59
41	unodc.org	59
42	bpb.de	59
43	anu.edu.au	59
44	northeastern.edu	58
45	fu-berlin.de	58
46	yorku.ca	58
47	sydney.edu.au	58
48	commondreams.org	58
49	udn.com	58
50	scirp.org	58

Showing the strongest 50 of 772. Compare u4.no with a competitor in the backlink checker.

When was u4.no registered?

u4.no was registered on 20 March 2002 through GROUP.ONE NORWAY AS.

Registered	20 March 2002
Expires	1 January 1970
Last updated	20 March 2026
Registrar	GROUP.ONE NORWAY AS
Name servers	ns01.no.brand.one.com, ns02.no.brand.one.com

Straight from the domain registry. Owners' personal details are hidden by law, so to reach the owner use the website's own contact page or the registrar. Full record: WHOIS lookup.

Where is u4.no hosted, and what is it built with?

We check the live website when you ask, so this page stays fast.

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Link data: Common Crawl web graph, July–September 2026. Registration data: the domain registry, checked 4 November 2026. Look up another website on the website report page.