opt-j.com website report
Authority, global rank, the websites that link to opt-j.com, when it was registered and where it's hosted – free, from public data.
authority
global rank of 133,241,980
websites link to it
domain age
How strong is opt-j.com?
opt-j.com has an XKey authority of 35 out of 100, which makes it a well-established website. It ranks #182,622 of 133,241,980 websites by how central it is to the web's links – the top 0.14%. 61 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 opt-j.com?
The 50 strongest websites linking to opt-j.com, by link strength (0–100). Select any one to see its own report.
| # | Website linking to it | Link strength |
|---|---|---|
| 1 | google.com | 99 |
| 2 | wixsite.com | 76 |
| 3 | jst.go.jp | 63 |
| 4 | u-tokyo.ac.jp | 59 |
| 5 | dtu.dk | 54 |
| 6 | osaka-u.ac.jp | 54 |
| 7 | tohoku.ac.jp | 53 |
| 8 | kyushu-u.ac.jp | 53 |
| 9 | nagoya-u.ac.jp | 52 |
| 10 | aist.go.jp | 51 |
| 11 | titech.ac.jp | 50 |
| 12 | nao.ac.jp | 50 |
| 13 | yonsei.ac.kr | 48 |
| 14 | atlas.jp | 47 |
| 15 | waseda.ac.jp | 47 |
| 16 | ynu.ac.jp | 44 |
| 17 | kwansei.ac.jp | 44 |
| 18 | omu.ac.jp | 44 |
| 19 | uec.ac.jp | 44 |
| 20 | shizuoka.ac.jp | 43 |
| 21 | tokushima-u.ac.jp | 43 |
| 22 | laserfocusworld.com | 42 |
| 23 | saitama-u.ac.jp | 42 |
| 24 | jsme.or.jp | 41 |
| 25 | isct.ac.jp | 41 |
| 26 | tut.ac.jp | 41 |
| 27 | wakayama-u.ac.jp | 40 |
| 28 | jsap.or.jp | 40 |
| 29 | iee.jp | 36 |
| 30 | nifs.ac.jp | 35 |
| 31 | optronics-media.com | 32 |
| 32 | icassct.com | 31 |
| 33 | biophys.jp | 30 |
| 34 | jaima.or.jp | 30 |
| 35 | europeanoptics.org | 29 |
| 36 | labby.jp | 29 |
| 37 | oitda.or.jp | 28 |
| 38 | tokyoinst.co.jp | 27 |
| 39 | photochemistry.jp | 27 |
| 40 | klv.co.jp | 26 |
| 41 | optoscience.com | 26 |
| 42 | jamit.jp | 25 |
| 43 | oxinst.jp | 24 |
| 44 | piphotonics.com | 24 |
| 45 | sevensix.co.jp | 24 |
| 46 | jfca-net.or.jp | 23 |
| 47 | autex-inc.co.jp | 22 |
| 48 | kagaku.com | 22 |
| 49 | variantor.com | 19 |
| 50 | utsunomiya-convention.jp | 18 |
Showing the strongest 50 of 61. Compare opt-j.com with a competitor in the backlink checker.
When was opt-j.com registered?
opt-j.com was registered on 16 March 2004 through XServer, Inc., and is paid up until 16 March 2028.
| Registered | 16 March 2004 |
|---|---|
| Expires | 16 March 2028 |
| Last updated | 4 June 2026 |
| Registrar | XServer, Inc. |
| Name servers | ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp |
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 opt-j.com 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 12 November 2026. Look up another website on the website report page.