Expired domains in education and courses

Originally a site about books and publishing (2005-2007), then abruptly shifted to a resource for preparing for entrance exams to Japanese universities (2007-2019). The final niche before the drop was educational, which likely attracted the bulk of the backlinks.

The entire stable history (from 2015 to 2021) is a personal site/blog under the name Max Dufrechou; no niche changes detected. Before 2015 — just a title placeholder "D-212A79.com". The final niche before the drop was a personal brand; if the links pointed to the name/personal site, it matches the profile, but for a PBN in a different niche it will be irrelevant.

Originally the site was called "Tecnobit Computer", and from 2006 it steadily developed as "D-0D095E" in the IT training niche (ECDL, web design, graphics, software) until 2012. After 2013, the domain was parked.

From 2005 until approximately 2017, the site was dedicated to a personal practice of "healing" and meditation (I am Healing / フルフィルメント瞑想), after which it shifted to a commercial meditation school site in Tokyo ("瞑想スペースSOMA"), which remained active until 2022.

Stable Japanese niche focused on job placement for graduates of vocational schools (D-3F9B67) from 2018 to 2023, with no niche changes.

From 2006 to 2016, the domain consistently operated as the website of the Chinese language school "ハンズアカデミー" in Shibuya (Tokyo). After 2017, the niche shifted to a personal blog "Snow Mail -Kyoko's Blog-", then to an article about an aesthetics salon in Sendai, and by 2020 — to a Chinese store; in 2025 — an empty page/redirect.

From 2016 to 2021, the domain was consistently used as a personal website for politician D-739E36 — a candidate/hetman of the Pilsen Region. No change in topic was recorded; since 2022, it has been parked on a Web4U landing page.

Stable niche of a dog training school ("Hundeschule Fiffikus") from 2006 to 2018. Since 2023, the content has disappeared, and the site serves blank pages without page titles, indicating a drop and downtime.

From 2003 to 2010, the domain consistently represented Université Notre Dame d'Haiti (a Haitian university) without a change in niche. After 2014, the content disappeared, the site turned into a parking/for-sale page, and the final niche before the drop was not content-based.

Stable niche — firearms training. No niche change detected; the site kept the same page title throughout its entire history.

Website of a Japanese English language school (Ian's English House) with a specific location in Nagano. The niche remained stable throughout its active life (2016–2025), except for technical "DOMAIN ERROR" glitches, with no niche changes.

Stable niche of a Czech academy (likely educational courses) with no changes throughout its entire history from 2018 to 2025.

No obvious niche changes detected (0 times). From 2021 to 2022, the site was positioned as "D-26FBFE – The Exceptional Education Technicians" (education-tech/recruiting niche). From December 2023 to May 2024, the page title was simply "D-26FBFE.net" (likely domain parking), and from July 2024 to 2026, it was "D-26FBFE -" (brand without a descriptive part). The final niche, based on the title, remained within the brand, but relevance to the historical link profile is not confirmed.

From 2013 to 2021 — the site of a language school in Rennes (courses in English, German, Spanish). The niche is stable, with no changes. Since 2022, the page title has changed to just "D-0587A6.net", indicating domain parking or an empty placeholder after the drop.

Originally (2005–2014) a stable educational site (Region 4 Education Service Center). Since 2014, the niche disappeared, the site turned into a content-free placeholder with the domain as the page title, and then (from 2017) showed empty page titles and load errors, indicating a complete loss of content and functionality. The final niche before the drop was parking/blank page, which does not match the niche that built the link profile.

Originally (2007-2009) the domain was used as a portal for "Gay-Bi-Lesbian Network" (LGBTQ+ niche). Since 2012, the niche fully shifted to "Global Business Learning" (business education), which remained until the domain dropped.

The domain was long associated with a children's niche (2017–2022), likely a charity or educational project "ÚSTÍ dětem". In 2025, the content shifted to commercial (a coupon/discount site "Velké slevy"), which is completely irrelevant to the original niche and the accumulated link profile.

From 2006 to 2019, the domain consistently represented the Italian professional training center CIOFS/FP Puglia. Since 2022, the topic has shifted to an empty site with no clear content.

From 2001 to 2006, the domain was a stable educational site 'Fabris Learning'. Then, after a long period of domain parking (2014–2022), in 2022 it completely changed its niche to online business ('D-FBDAB5 – online business-Lickin' Good'). There is no thematic continuity with the period of active link acquisition.

Stable niche from 2006 to 2021 — Italian vocational training school in the construction sector (D-31D052). No niche changes recorded.