List of 400 registered instances:
masto.allerlei.it
mastodon.jamidisi-edu.de
social.crablab.uk
mastodon.greatvoid.org
mastodon.kug.is
mastodon.thecrimsontint.com
mastodon.kaschemme701.com
borg.social
mastodon.daponline.com
social.blazma.st
her-mann.de
bytepark.social
mooose.org
eva.cosplaytweet.com
pfalz.social
falkensee.social
social.13-dx.de
mastodon.mcb-it.de
ciechom.nohost.me
burningboard.net
fed.crimsh.com
frawas.de
mstdn.fun.systems
penguicon.social
mastodon.1337.blue
mastodon.kmu-angebote.ch
mastodon.rh-social.org
f.dresden.network
mastodon.magnor.ovh
mastodon.ozioso.online
toot.wiai.de
elbmatsch.de
social.trackside.blog
partyparrot.social
plaudern.duckdns.org
social.cybertalk.io
mastodon.itwichtel.de
mastodon.zapfmeister.net
re.lire.im
strangeminds.social
mastodon.rzgierskopp.de
social.michels.xyz
brettspiel.space
social.zentonic.org
social.wokurka.net
mastodon.nextcraft.link
watzmann.social
goingdark.social
sharkey.coffeeandtrains.de
drip_drip_drip.activityocean.org
mastodon.zypper.net
masto.baranovski.cloud
mastodon.alphapuggle.dev
md.jott-emm.social
social.stezen.de
ratingen.social
mastodon.flups.familyds.org
mastodon.loss.com.de
fediverse.serialexperiments.club
fediverse.live
mastodon.bayern
mastodon.fonsos.com
noto.social
social.cooltux.net
otaku.1337.blue
runbsd.duckdns.org
mstdn.budgie.lol
vaughan.social
sueden.social
social.misk.cf
ottweiler.social
social.ceod.net
social.domaincrawler.com
mastodon.baderpetrick.de
toot.houbahouba.de
swedishmastodon.social
mas.todon.de
troetmund.de
mastodon.gaias.social
schnauzer.cafe
is-likely.gay
social.greatvoid.org
netcup.social
maztodon.se
social.vleij.com
mastopouet.fr
masto.budgie.lol
social-potsdam.space
social-pflege.de
buckaroo.city
mastodon.mariustimmer.de
soc.cluboftone.com
misskey.eskimo.com
catswords.social
sozial.roter-kreis.de
notwork.in
social.macer.life
mastodon.terpotiz.net
social.minecodes.de
mastodon.olivernitsche.synology.me
social.la-scic.fr
social.asgardius.company
blog.davidmckeitch.com
social.kalterwinter.info
mastodon.jabbxi.de
mastodon.livingonlinenow.com
guerrill.art
glitch.sekbaer.de
troet.burg-halle.de
social.main-angler.de
fedineko.org
social.spicysources.de
social.media-techport.de
devellight.space
social.k2pk.com
mastodon.wivodaim.net
mastodonian.org
sns.onjann.club
mastodon.pixadon.ch
social.techniverse.net
space.jeroenvd.nl
nochiiverse.eu
social.alpacaverse.games
mastodon.trabus322.eu
troet.witte-nyumbani.de
troete.rechenkugel.de
social.eubf.net
social.noriakisana.dev
dresden.network
cailincat.cloud
hi.fabis.cafe
mastodon.nordic.online
m.heine.xyz
mastodon.kuenet.ch
mastodon.enitin.xyz
social.sebastian-neu.de
hauntshadesocial.nl
upload.chat
mastodon.wappler.systems
m.freq.io
techtett.de
firefish.nospy.net
skyland.social
social.amichan.de
mastodon.dev-null.rocks
k2pk.com
homo.1919810.space
social.kyzune.com
mstdn.business
social.sixdegreesofohio.com
tranvender.site
mastodon.phundrak.com
mstdn.dru5k1.io
mstdn.doern.tech
ruz.social
unredacted.social
mastodon.bruckner.email
fediverse.hybridlehrer.de
social.sp-codes.de
17th.me
social.onlythe.net
m.pilz.foo
social.rooty.fr
bb5.social
social.merk.ac
vhs.social
eva00.cosplaytweet.com
mastodon.joschlies.nohost.me
plusi.moe
thomasjpr.social
kupione.click
social.dvdr.download
mastodon.blocki.net
mast.flups.familyds.org
mas.x64.onl
mastodon.koch-server.de
friendica.collectifdhun.ovh
justabit.social
fursona.party
gnurfl.de
mastodon.liersch.it
mastodon.greilach.dev
birdbox.party
firefish.crazy-to-bike.de
social.marzillier.net
fastani.me
mastodon.naugrim.org
mastodon.calitabby.net
mastodon.saarland.social
mastodon.friendnet.eu
soc.c11um.de
mstdn.canarylabs.eu
mastdn.io
misskey.dream-universe.org
mastodon.digilol.net
social.xnet.place
mastdn.coffeehack.org
social.stefanberger.net
edafe.social
test.mastodon.makerforce.io
sidestore.social
social.insider-it.de
social.yussuv.com
sachsen-medien.social
mastodon.projetretro.io
ciechom.eu
social.klein.ruhr
mastodon.deepspace.cafe
mstdn.jklmno.org
fedi.timka.win
mrrp.chimmie.k.vu
mastodon.mapf.net
m.mirv.top
social.flashz.directory
zeebo.social
cosplaytweet.com
mastodon.adtension.com
mastodon.mrtoto.de
social.beachcom.org
liberareto.nesohub.org
observatory.cyber.harvard.edu
social.peregrinor.net
sharkeyspace.de
talk.mls20.de
stpauli.social
jasdemi.com
soc.intxiv.io
mastodon.irridium.de
mastodon.jonasled.de
pink-unicorn.club
mstdn.jmrp.io
nautical.social
mastodon.preusse.berlin
mastodontech.de
schumacher.social
social.adlerweb.info
lab.wheelsbot.dev
mastodon.cyberreality.org
mastodon.helvetet.eu
toot.brumm.family
mastodon.myocci.social
social.championpictures.at
social.iamernie.ca
fruef.social
mastodon.dsss.space
sharkey.nospy.net
mastodon.dnns.icu
linksextrem.ist
masto.uc-netcorsoft.de
mastodon.1up2down.social
mastdn.communisme-informel.zone
social.breisgaucave.de
mastodon-dev.stevex.online
fedi.bcna.de
toot.againstallodds.games
masto2.100flowers.tech
social.rrrr.wtf
masto.versagt.wien
mastodon.solvality.com
m.deepspace.cafe
mastodon.tgo.social
racoon.social
fedi.abmgrt.dev
m.flaem.ing
disobey.net
schraepler.de
social.itwien.net
social.appbakery.ee
qicx.net
public.brothertec.eu
mastodon.scientiam.org
dol.social
kitty.community
privacysafe.social
fedispace.de
x.good.news
inthedeltawaves.social
mastodon.moestel.eu
shout.3xd.eu
afterspace.rocks
mastodon.rprivat.eu
schaumburg.social
mstdn.mv2k.com
social.rand0m.fail
talk.balfolk.social
mastodon.deathbybandaid.net
swissodon.ch
toot.zerojay.com
soziale.cloud
bayerwald.social
social.anno79.de
atergens.com
mastodon.wananavuoutfitters.com
hacks.fi
mastodon.dsdrive.fr
social.retronerd.at
bremen.digital
fedi.latenightpopcorn.com
status.pointless.one
social.suchtbasis.de
privacyofficers.social
mstdn.sekbaer.de
tacheles.social
mstdn.org
sipstea.town
club.dd5aa.de
astroposting.de
social.msaood.com
mastodon.hausofhomeaux.ca
social.digital-artifacts.net
mastodon.maechler.cloud
mast.marzillier.net
mastodon.jhcooke.com
social.rsl.gg
m.lonet.org
social.schnitzler.one
fedihub.de
mastodon.une.fi
social.xyntion.consulting
social.zerojay.com
franken.social
key.by0.tech
social.undeadnetwork.de
social.archworks.co
social.khaus.io
miltodon.social
shark.datenkastl.de
unseen-university.social
social.galih.me
social.beaware.live
activityocean.org
spreebits.de
social.pericles.hu
mstdn.fan
mastodon.malmoe.social
whatisthat.xyz
burnout.cafe
mastodon.bstly.de
masto.kurohana.me
mstdn.kielo.me
social.autonomy.earth
social.glisco.de
mastodon.mrak.at
social.hostnetwork.xyz
mastodon.derg.nz
stay.woke.institute
mastodon.gramschladen.de
ramblings.social
mast.internal.nullreference.io
c64.social
firefish.fediverse.live
genista.osrx.chat
ruby.good.news
social.krserv.de
thohme.de
misskey.bootjp.me
flipboard.social
mastodon.eskimo.com
mastodon.hostnetwork.xyz
mastodon.darkness.services
social.vermona.com
mast.lukeog.com
netzverpetzer.de
social.grafschaft-aw.de
fed.interfree.ca
opencoaster.net
leipzig.town
mastodon.forty-two.sh
firefish.nesohub.org
frinx.online
apotheke.social
mastodon.mynet.one
flauschbar.thoshiswelt.de
social.k1024.de
fedi.social
yapmi.net
social.eggipedia.de
knse.net
mastodon.gemo.social
connect.braydmedia.de
collins-corner.cc
mastodon.georgschilling.de
pleroma.gruenelin.de
social.otsuka.haus
soc.cluboftone.com
fediblock.24-7.ro
declin.eu
station.y-space.de
waifus.biz
social.elstabloserver.de
pleroma.7seven.cloud
social.kyzune.com
social.mdosch.de
fediblock.lol
fedi.u2p.net
ferals-on.top
fedi.kooosh.de
glegle.party
akkoma.alster.space
social.vengeful.eu