List of 403 registered instances:
mastdn.coffeehack.org
vaughan.social
otaku.1337.blue
tranvender.site
masto.baranovski.cloud
dol.social
sharkey.nospy.net
mastodon.kuenet.ch
mastodon.enitin.xyz
swedishmastodon.social
liberareto.nesohub.org
schraepler.de
fastani.me
mstdn.mv2k.com
social.domaincrawler.com
mastodon.nordic.online
sharkey.coffeeandtrains.de
noto.social
schaumburg.social
social.la-scic.fr
social.archworks.co
mastodon.rprivat.eu
social.macer.life
mastodon.solvality.com
privacyofficers.social
collins-corner.cc
mastodon.gemo.social
social.breisgaucave.de
mastodon.fonsos.com
key.by0.tech
mastodon.calitabby.net
social.sixdegreesofohio.com
falkensee.social
mastodon.zypper.net
m.heine.xyz
mastodon.trabus322.eu
hacks.fi
talk.mls20.de
social.autonomy.earth
mas.x64.onl
mastodon.magnor.ovh
linksextrem.ist
frinx.online
dorm.social
bayerwald.social
mastodon.loss.com.de
m.deepspace.cafe
mastodon.moestel.eu
troetmund.de
mooose.org
social.khaus.io
is-likely.gay
mastodon.tgo.social
soc.c11um.de
social.rsl.gg
mstdn.fun.systems
mastdn.communisme-informel.zone
hi.fabis.cafe
bremen.digital
masto.allerlei.it
mastodon.malmoe.social
mastodon.derg.nz
mastodon.livingonlinenow.com
sueden.social
social.greatvoid.org
mastodon.myocci.social
masto2.100flowers.tech
connect.braydmedia.de
mastodon.nextcraft.link
md.jott-emm.social
social.michels.xyz
mastodon.joschlies.nohost.me
mstdn.business
schnauzer.cafe
mastodon.rh-social.org
fedineko.org
mastodon.1337.blue
pfalz.social
shout.3xd.eu
re.lire.im
thomasjpr.social
social.xnet.place
test.mastodon.makerforce.io
elbmatsch.de
gnurfl.de
ratingen.social
mast.lukeog.com
mstdn.jklmno.org
masto.versagt.wien
spreebits.de
mastodontech.de
borg.social
guerrill.art
space.jeroenvd.nl
observatory.cyber.harvard.edu
mas.todon.de
social.crablab.uk
devellight.space
public.brothertec.eu
mastodon.dsdrive.fr
glitch.sekbaer.de
qicx.net
ciechom.eu
social.iamernie.ca
social.eggipedia.de
mastodon.gaias.social
cailincat.cloud
mastodon.hostnetwork.xyz
friendica.collectifdhun.ovh
swissodon.ch
mastodon.hausofhomeaux.ca
privacysafe.social
mastodon.georgschilling.de
opencoaster.net
mastodon.baderpetrick.de
x.good.news
franken.social
activityocean.org
mastodon.jabbxi.de
mastodon.phundrak.com
mastodon.deepspace.cafe
social.schnitzler.one
mastodon.maechler.cloud
social.hostnetwork.xyz
buckaroo.city
masto.kurohana.me
mastodon.wananavuoutfitters.com
mastodon.greatvoid.org
soc.intxiv.io
mastodon.zapfmeister.net
mstdn.doern.tech
mastodon.darkness.services
sachsen-medien.social
social.insider-it.de
masto.budgie.lol
mrrp.chimmie.k.vu
social.eubf.net
ruby.good.news
sidestore.social
mastodon.greilach.dev
disobey.net
social.kalterwinter.info
nochiiverse.eu
misskey.dream-universe.org
social.stezen.de
toot.brumm.family
social.pericles.hu
mastodon.jhcooke.com
ruz.social
mastodon.forty-two.sh
mastodon.irridium.de
mastodon.thecrimsontint.com
mastodon.itwichtel.de
mastodon.flups.familyds.org
mastodon.ozioso.online
mastodon-dev.stevex.online
social.sp-codes.de
inthedeltawaves.social
sozial.roter-kreis.de
fursona.party
mastodon.bayern
mastodon.wivodaim.net
status.pointless.one
eva.cosplaytweet.com
frawas.de
her-mann.de
fed.crimsh.com
toot.wiai.de
schumacher.social
hauntshadesocial.nl
mstdn.dru5k1.io
ciechom.nohost.me
mastodon.eskimo.com
edafe.social
17th.me
social.msaood.com
social.xyntion.consulting
social.galih.me
social-potsdam.space
burnout.cafe
social.wokurka.net
mastodon.terpotiz.net
social.grafschaft-aw.de
mastopouet.fr
mastodon.dev-null.rocks
mastodon.kug.is
mastodon.daponline.com
toot.againstallodds.games
mast.marzillier.net
mastodon.adtension.com
leipzig.town
unseen-university.social
afterspace.rocks
justabit.social
social.anno79.de
social.peregrinor.net
social.stefanberger.net
fed.interfree.ca
social.kyzune.com
mastodon.kaschemme701.com
blog.davidmckeitch.com
social.main-angler.de
social.merk.ac
mastodon.cyberreality.org
kupione.click
social.rrrr.wtf
social.vermona.com
mastodon.saarland.social
goingdark.social
misskey.bootjp.me
lab.wheelsbot.dev
mastodon.friendnet.eu
yapmi.net
firefish.crazy-to-bike.de
social.amichan.de
racoon.social
social.beaware.live
bytepark.social
plaudern.duckdns.org
social.flashz.directory
brettspiel.space
m.pilz.foo
mastodon.rzgierskopp.de
genista.osrx.chat
mastodon.mcb-it.de
troet.witte-nyumbani.de
fediverse.live
social.krserv.de
mastodon.dsss.space
mastodon.naugrim.org
soziale.cloud
sharkeyspace.de
social.onlythe.net
mastodon.digilol.net
unredacted.social
talk.balfolk.social
social.glisco.de
k2pk.com
social.itwien.net
social.ceod.net
mastodon.alphapuggle.dev
social.cybertalk.io
mstdn.org
social.k2pk.com
social.blazma.st
vhs.social
maztodon.se
mastodon.jamidisi-edu.de
social.rand0m.fail
netzverpetzer.de
mastodon.helvetet.eu
mastodon.pixadon.ch
social.beachcom.org
eva00.cosplaytweet.com
mastodon.olivernitsche.synology.me
mast.flups.familyds.org
mast.internal.nullreference.io
social.rooty.fr
zeebo.social
social.spicysources.de
social.undeadnetwork.de
shark.datenkastl.de
ottweiler.social
social.retronerd.at
fediverse.serialexperiments.club
mastodon.mynet.one
m.flaem.ing
f.dresden.network
m.lonet.org
social.alpacaverse.games
kitty.community
sns.onjann.club
fedi.latenightpopcorn.com
social.vleij.com
firefish.fediverse.live
m.freq.io
mastodon.mrak.at
miltodon.social
social.adlerweb.info
thohme.de
netcup.social
mastodon.projetretro.io
birdbox.party
mastodon.une.fi
mstdn.kielo.me
mastodon.gramschladen.de
toot.houbahouba.de
firefish.nospy.net
stay.woke.institute
mstdn.fan
pink-unicorn.club
stpauli.social
mstdn.budgie.lol
social.13-dx.de
fedi.timka.win
social.sebastian-neu.de
strangeminds.social
social.minecodes.de
sipstea.town
tacheles.social
fediverse.hybridlehrer.de
mastodon.liersch.it
fedispace.de
ramblings.social
mastodon.wappler.systems
watzmann.social
social.techniverse.net
runbsd.duckdns.org
homo.1919810.space
partyparrot.social
bb5.social
mastodon.bstly.de
mastodon.koch-server.de
mastodon.mariustimmer.de
social.appbakery.ee
atergens.com
fedi.abmgrt.dev
catswords.social
misskey.eskimo.com
social.yussuv.com
social.trackside.blog
mastodonian.org
flauschbar.thoshiswelt.de
masto.tstoll.me
burningboard.net
c64.social
upload.chat
m.mirv.top
mastdn.io
mastodon.jonasled.de
social.digital-artifacts.net
social.klein.ruhr
flipboard.social
social.noriakisana.dev
mastodon.blocki.net
astroposting.de
social.cooltux.net
mastodon.dnns.icu
fruef.social
social.zerojay.com
social.k1024.de
mastodon.scientiam.org
social-pflege.de
knse.net
mastodon.1up2down.social
plusi.moe
club.dd5aa.de
troete.rechenkugel.de
social.asgardius.company
social.marzillier.net
jasdemi.com
penguicon.social
social.suchtbasis.de
mastodon.deathbybandaid.net
mastodon.mrtoto.de
mastodon.kmu-angebote.ch
skyland.social
toot.zerojay.com
troet.burg-halle.de
notwork.in
social.misk.cf
mastodon.bruckner.email
social.media-techport.de
social.dvdr.download
cosplaytweet.com
soc.cluboftone.com
fedi.social
nautical.social
mstdn.canarylabs.eu
techtett.de
mstdn.sekbaer.de
dresden.network
masto.uc-netcorsoft.de
fedihub.de
social.zentonic.org
mastodon.mapf.net
social.championpictures.at
drip_drip_drip.activityocean.org
firefish.nesohub.org
whatisthat.xyz
mstdn.jmrp.io
fedi.bcna.de
apotheke.social
ferals-on.top
social.vengeful.eu
fediblock.lol
fedi.kooosh.de
pleroma.gruenelin.de
fedi.u2p.net
waifus.biz
fedi.bryie.com
akkoma.alster.space
social.otsuka.haus
reactionarytenderqueer.minecraftnoob.com
station.y-space.de
pleroma.7seven.cloud
glegle.party
social.mdosch.de
fediblock.24-7.ro
declin.eu
social.kyzune.com
social.elstabloserver.de
soc.cluboftone.com