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Site Information

bolerium.com

Link authority for bolerium.com (registrable domain: bolerium.com) from the Common Crawl web graph: PageRank and harmonic centrality history since 2017, current scores, and the site's top backlink sources.

9Domain PageRank
5Host Backlinks
104Domain Backlinks
Link authority data (PageRank, harmonic centrality) and backlinks come from the Common Crawl web graph.
bolerium_com.profile
Current Scores

Web-graph authority (0-100)

Domain scores measure bolerium.com as a whole: every subdomain's links rolled up into one node of Common Crawl's domain-level web graph. Host scores measure the exact hostname bolerium.com. WWW scores cover the www variant of that hostname, which the graph tracks as its own entry since January 2026 (before that, www and bare host were merged). A big gap between domain and host usually means the domain's authority lives on other subdomains. PageRank is link-endorsement authority: how much weight the sites linking here carry themselves. Harmonic centrality measures reach: how close this site sits to the rest of the web when following links, which favors broadly connected sites over ones boosted by a few heavy linkers. All are normalized 0 to 100 within each crawl snapshot; a dash means that series does not exist for this site.

9
Domain PageRank
0
Host PageRank
5
WWW PageRank
95
Domain Harmonic Centrality
93
Host Harmonic Centrality
95
WWW Harmonic Centrality
Site Intelligence

Homepage

What bolerium.com presents on its own homepage: the page title, description, and the social share markup it publishes. Pulled from https://bolerium.com.

TitleBolerium Books
DescriptionWelcome to the website of Bolerium Books
OG Site NameBolerium Books
Site Intelligence

Social accounts and contact points

Where this site maintains a presence and every reachable route its homepage exposes: social accounts, contact pages, addresses, and content feeds.

Site Intelligence

Structured data (JSON-LD)

The schema.org markup this homepage publishes: the machine-readable identity search engines and AI systems read. Types found: Organization.

JSON-LD block (720 bytes)
{"@context":"https://schema.org","@type":"Organization","name":"Bolerium Books","@id":"https://www.bolerium.com/","url":"https://www.bolerium.com/","address":"2141 Mission Street #300, San Francisco, CA 94110, Hours:, Bolerium Books is now open by appointment only. Please call or email to arrange an appropriate time to visit  based on your interests, our staffing levels, and  our capacity limits. Be aware, many  areas are no longer accessible for browsing so you should prepare a list from our on-line listings of titles you're interested in and let us know in advance so we can have them ready for you..","telephone":"(415)-863-6353","email":"info@bolerium.com","logo":"https://www.bolerium.com/images/logo.png"}
Web-Graph History

Authority over time

Every Common Crawl web-graph release since 2017, roughly quarterly. The domain series goes back to 2017; Common Crawl only began publishing the host-level graph in 2020, so host lines start there. Click a legend entry to show or hide that line. Flat lines are normal for established sites; watch for sustained rises or drops, which track real gains or losses in who links here.

A note on www: through the end of 2025 the source web graph merged www and non-www hostnames into the bare name, so one host line covers both. Starting in January 2026 the graph splits them into separate entries, which is why www can carry its own scores going forward.

Backlink Data

Backlink counts

Unique linking domains seen in Common Crawl's link graphs. This is a different dataset than the 0-100 authority scores above: these are raw counts, host-level for bolerium.com and domain-level for bolerium.com with all its subdomains combined. Common Crawl covers a large sample of the web, not all of it, so treat counts as comparable between sites rather than absolute totals.

5
Host Backlinks
104
Domain Backlinks
Backlink Data

Top backlinks in the domain graph

Common Crawl publishes two link graphs. The DOMAIN graph connects whole domains: every link from any page of one domain to any page of another. This table shows the highest-authority domains linking to bolerium.com (including its subdomains), ranked by the linker's PageRank. The table shows the top 104; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.

Download domain backlinks (.json)

Linking SiteLinker PageRankLinker Harmonic Centrality
wikipedia.org9053
blogspot.com8648
harvard.edu8045
washington.edu7542
oclc.org7241
brown.edu7138
mentalfloss.com6736
healthbenefitstimes.com6734
kiplinger.com6635
bitbucket.io6335
fontsinuse.com6235
jacobin.com6135
slj.com5834
truthdig.com5834
cnas.org5826
aperture.org5734
ilab.org5423
thebolditalic.com5233
spartacus-educational.com5134
peoplesworld.org5134
stopwaste.org5134
webket.jp5019
foundsf.org4934
greenleft.org.au4933
sjc.edu4924
48hills.org4825
irr.org.uk4734
wolfsonian.org4724
metapedia.org4624
drsusanblock.com4433
covertactionmagazine.com4433
outhistory.org4424
transat.com4423
8ch.net4333
solidarity-us.org4124
vialibri.net4124
brokeassstuart.com4124
discoverthenetworks.org4124
moonofalabama.org4123
cpusa.org3923
gimpsy.com3823
thetedkarchive.com3733
praxeology.net3724
earlyaviators.com3723
writingitreal.com3633
odp.org3524
positionspolitics.org3523
writingtipsoasis.com3523
peaceandfreedom.us3423
magazine-spirale.com3323
amerikabulteni.com3222
geometry.net3023
libertarian-labyrinth.org3023
richardhuntsculptor.org3023
sfartbookfair.com2922
nlcs.gov.bt2720
pinktickettravel.com2623
academy-sf.com2321
californiadesertart.com2222
bayareacurrent.com2221
lconline.org2220
johnriddell.com2123
lavozdelarepublica.es2023
antiauthoritarian.net2023
worldbusinesspromote.com1918
nimareja.fr1723
grassrootsthinking.com1722
drstefanschneider.de1623
wiki7.org1623
ask1.org1623
davidaromero.com1622
toonzday.com1522
faroutcompany.com1522
sicplant.it1518
altlib.org1423
bjland.ws1422
kwsnet.com1422
alternativechance.org1422
nickharvilllibraries.com1323
sbookscan.com1323
reunion68.se1023
hungerbutton.org1022
warpoetry.org1017
backlinks.sbs918
veronicairwin.com819
synaesthesia.net722
gingerpressbooks.com613
crookedtreehouse.com522
jespiders.org512
domains.foundation418
awsportsind.com413
cultconfessions2.com413
pandiphil.com412
constitute.net318
keeh.net317
lindsaywincherauk.com313
dauphinwayalf.com311
pot-shot.ca212
machineryquestion.com20
inika.lv17
consiglinonna.com00
pixelorperish.com00
mycoveragepolicy.com00
luxurynaturalcraft.com00
Backlink Data

Top backlinks in the host graph

The HOST graph connects exact hostnames, so subdomains count separately. This table shows the highest-authority hosts linking to bolerium.com specifically, ranked by the linker's PageRank. The table shows the top 5; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.

Download host backlinks (.json)

Linking SiteLinker PageRankLinker Harmonic Centrality
www.sbookscan.com2021
www.domains.foundation1814
worldbusinesspromote.com1713
www.constitute.net213
www.backlinks.sbs213