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NR4JMark | Amateur radio — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Space And Astronomy →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
millseyspages.com ↗	67 match 1 shared topics	John Mills - Astronomical, Musical and Amateur Radio website	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
nt7s.com ↗	66 match 1 shared topics	Ripples in the Ether – Emanations from Amateur Radio Station NT7S	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
astrams.com ↗	65 match 1 shared topics	LESAstros Astronomie Amateur	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astroveto.com ↗	64 match 1 shared topics	Astroveto – Amateur Astrophotography in Czechia	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
astrojolo.com ↗	64 match 1 shared topics	astrojolo - amateur astronomy and astrophotography site	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
typinski.com ↗	64 match 1 shared topics	Typinski Radio Astronomy	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astrocookbook.com ↗	64 match 1 shared topics	The Amateur Astrophotographer's Cookbook – From humble beginnings	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
astrogdl.com ↗	63 match 1 shared topics	AstroGDL.com, Amateur Astronomy, Astrophotography, Backyard Astronomy	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
quinsightspectre.com ↗	63 match 1 shared topics	QuInsightSpectre.com – Advanced and Unusual Optics for Amateur Astronomy	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
rc-cosmetics.com ↗	63 match 1 shared topics	The Dark Matters Radio Show hosted by Don Ecker	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astrosaurus.com ↗	63 match 1 shared topics	Astrosaurus \| Helping amateur astronomers discover the beauty of the night sky	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
3ap.org ↗	63 match 1 shared topics	Amateur Astronomers Association of Pittsburgh – Your Bridge to the Stars	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
pictortelescope.com ↗	63 match 1 shared topics	PICTOR: A free-to-use Radio Telescope	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
guanacaste.com ↗	63 match 1 shared topics	Carl Hancock – CEO and Co-Founder of Gravity Forms, Rocketgenius and Gravity. Amateur astronaut.	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
astron00b.com ↗	62 match 1 shared topics	AstroN00b – Radio Astronomy for Beginners	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
cavendishradiocosmology.com ↗	62 match 1 shared topics	CAVENDISH RADIO ASTRONOMY & COSMOLOGY - Home	en	space-and-astronomy Weebly	robotsllmsaihumans	emailphone	none
astrobaddieradio.com ↗	62 match 1 shared topics	Astro Baddie Radio \| Cosmic Stories, Captivating Sounds	en	space-and-astronomy	robots llmsaihumans	emailphone	none
dark-places.org.uk ↗	62 match 1 shared topics	dark places	United Kingdom en	space-and-astronomy Drupal	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.