Federal agency domains from USA.gov

domains.js

var _ = require('underscore');
var async = require('async');
var request = require('request');

var domains = [
      // Federal non-.gov domains
      {
        url: 'http://govt-urls.usa.gov/tematres/vocab/services.php?output=json&task=fetchDown&arg=17',
        json: true,
      },
      // Federal .gov domains
      {
        url: 'http://govt-urls.usa.gov/tematres/vocab/services.php?output=json&task=fetchDown&arg=11928',
        json: true
      }
    ];

async.map(domains, get, function(err, domains) {
  if (err) return console.error(err);
  domains = _(domains).chain().pluck('result').reduce(function(memo, values) {
    return _(memo).extend(values);
  }, {}).values().pluck('string').unique().value().sort();
  console.log(JSON.stringify(domains, null, 4));
});

function get(domain, callback) {
  request.get(domain, function(err, res, json) {
    if (err) return callback(err);
    callback(null, json);
  });
}

domains.json

[
    "18f.us",
    "404.gov",
    "9-11commission.gov",
    "911.gov",
    "911commission.gov",
    "Hudhre.info",
    "USCGAlaska.com",
    "USDirectExpress.com",
    "aapi.gov",
    "abandonedmines.gov",
    "abilityone.fed.us",
    "abilityone.gov",
    "abmc.gov",
    "academyadmissions.com",
    "access-board-members.gov",
    "access-board.gov",
    "acf.gov",
    "achp.gov",
    "acl.gov",
    "acquisition.gov",
    "acus.gov",
    "acwi.gov",
    "ada.gov",
    "adf.gov",
    "adlnet.gov",
    "adlnet.org",
    "admongo.gov",
    "adr.gov",
    "advantage.gov",
    "afadvantage.gov",
    "aff.gov",
    "afneurope.net",
    "afnpacific.net",
    "afpmb.org",
    "afreserve.com",
    "afrh.gov",
    "africanamericanhistorymonth.gov",
    "aftac.gov",
    "afterschool.gov",
    "afthunderbirds.com",
    "ag.gov",
    "ag.unr.edu/gbem",
    "agfirst.com",
    "agingstats.gov",
    "agribank.com",
    "ahcpr.gov",
    "ahrq.gov",
    "aids.gov",
    "airdefenseartillery.com",
    "airforce.com",
    "airnow.gov",
    "airspacemag.com",
    "ajb.org",
    "alaskacenters.gov",
    "alertaenlinea.gov",
    "alhurra.com",
    "altusandc.gov",
    "alzheimers.gov",
    "ama.gov",
    "amberalert.gov",
    "america.gov",
    "americanjobcenter.gov",
    "americanlatinomuseum.gov",
    "americanmemory.gov",
    "americasgreatoutdoors.gov",
    "americasheroesatwork.gov",
    "americaslibrary.gov",
    "americasstory.gov",
    "americastory.gov",
    "americathebeautifulquarters.gov",
    "americore.gov",
    "americorp.gov",
    "americorps.gov",
    "americorpsconnect.gov",
    "americorpsweek.gov",
    "ameslab.gov",
    "amtrak.com",
    "amtrakoig.gov",
    "amver.com",
    "anl.gov",
    "annualcreditreport.com",
    "annualcreditreport.gov",
    "anstaskforce.gov",
    "aoa.gov",
    "aoc.gov",
    "ap.gov",
    "applicationmanager.gov",
    "apps.gov",
    "aqi.gov",
    "arc.gov",
    "archives.gov",
    "arctic.gov",
    "arcticgas.gov",
    "arm.gov",
    "armedforcessports.com",
    "ars-grin.gov",
    "arsusda.gov",
    "arts.gov",
    "asap.gov",
    "asc.gov",
    "asianpacificheritage.gov",
    "askjan.org",
    "askkaren.gov",
    "astrongmiddleclass.gov",
    "atf.gov",
    "atvsafety.gov",
    "autocommunities.gov",
    "auxpa.org",
    "aviationweather.gov",
    "aww.aww-sp.com",
    "ayudaconmibanco.gov",
    "bam.gov",
    "bankanswers.gov",
    "bankcustomer.gov",
    "bankcustomerassistance.gov",
    "bankhelp.gov",
    "banknet.gov",
    "bankruptcy.gov",
    "bbg.gov",
    "bcfp.gov",
    "bea.gov",
    "befoodsafe.gov",
    "benefeds.com",
    "benefits.gov",
    "bep.gov",
    "bestbonesforever.gov",
    "betobaccofree.gov",
    "bfelob.gov",
    "bfem.gov",
    "bia.gov",
    "bie.edu",
    "bioeco.gov",
    "bioethics.gov",
    "biomassboard.gov",
    "biometriccoe.gov",
    "biometrics.gov",
    "biopreferred.gov",
    "biosecurityboard.gov",
    "bja.gov",
    "bjs.gov",
    "bldrdoc.gov",
    "blm.gov",
    "blmntl.gov",
    "bls.gov",
    "bnl.gov",
    "bobber.info",
    "boem.gov",
    "boemre.gov",
    "bondpro.gov",
    "bop.gov",
    "bor.gov",
    "bostonfed.org",
    "bpa.gov",
    "brac.gov",
    "brc.gov",
    "broadband.gov",
    "broadbandmap.gov",
    "browsetopics.gov",
    "bsee.gov",
    "bto.gov",
    "bts.gov",
    "budget.gov",
    "buildingamerica.gov",
    "bushlibrary.tamu.edu",
    "business.gov",
    "businessusa.gov",
    "buyaccessible.gov",
    "buyaccessible.net",
    "buyusa.gov",
    "c3.gov",
    "cancer.gov",
    "cancernet.gov",
    "cao.gov",
    "cap.gov",
    "capital.gov",
    "capitol.gov",
    "capitolflags.gov",
    "capitolhill.gov",
    "capmembers.com",
    "capnhq.gov",
    "carboncyclescience.gov",
    "careerinfonet.org",
    "careeronestop.org",
    "casl.gov",
    "cavc.gov",
    "cbca.gov",
    "cbi-epa.gov",
    "cbo.gov",
    "cbonews.gov",
    "cbp-ntep.info",
    "cbp.gov",
    "ccac.gov",
    "ccitoolsforfeds.org",
    "ccr.gov",
    "cdc.gov",
    "cdcnpin.org",
    "cdco.gov",
    "cdfifund.gov",
    "cdse.edu",
    "cebaf.gov",
    "cecc.gov",
    "cendi.gov",
    "census.gov",
    "cfa.gov",
    "cfcnexus.org",
    "cfda.gov",
    "cfe-dmha.org",
    "cflhd.gov",
    "cfo.gov",
    "cfpa.gov",
    "cfpb.gov",
    "cftc.gov",
    "cga.edu",
    "cgaux.org",
    "cge.concursolutions.com",
    "challenge.gov",
    "challenges.gov",
    "change.gov",
    "chcoc.gov",
    "chemsafety.gov",
    "chicagofed.org",
    "childreninadversity.gov",
    "childstats.gov",
    "childwelfare.gov",
    "china-commission.gov",
    "chinacommission.gov",
    "choosemyplate.gov",
    "christophercolumbusfoundation.gov",
    "cia.gov",
    "cidi.org",
    "cigie.gov",
    "cio.gov",
    "cipm.info",
    "citizencorps.gov",
    "citizencosponsors.gov",
    "citizens.gov",
    "civilianresponsecorps.gov",
    "civilrightsusa.gov",
    "clevelandfed.org",
    "climate.gov",
    "climatechange.gov",
    "clinicaltrial.gov",
    "clinicaltrials.gov",
    "clintonlibrary.gov",
    "clu-in.org",
    "clubdrugs.gov",
    "cms.gov",
    "cmts.gov",
    "cncs.gov",
    "cncsoig.gov",
    "cns.gov",
    "cnss.gov",
    "coast2050.gov",
    "coastalamerica.gov",
    "cobank.com",
    "college.gov",
    "collegedrinkingprevention.gov",
    "collegenavigator.gov",
    "coloradoriverrecovery.org",
    "commerce.gov",
    "commissaries.com",
    "commission.gov",
    "complaintreferralexpress.gov",
    "compliance.gov",
    "comptrollerofthecurrency.gov",
    "computers4learning.gov",
    "computersforlearning.gov",
    "congress.gov",
    "congressionaldirectory.gov",
    "congressionalrecord.gov",
    "connect.gov",
    "conservation.gov",
    "consumer.gov",
    "consumeraction.gov",
    "consumerbureau.gov",
    "consumerfinance.gov",
    "consumerfinancial.gov",
    "consumerfinancialbureau.gov",
    "consumerfinancialprotectionbureau.gov",
    "consumerprotection.gov",
    "consumerprotectionbureau.gov",
    "consumersentinel.gov",
    "consumersentinelnetwork.gov",
    "consumidor.gov",
    "continentalshelf.gov",
    "contractdirectory.gov",
    "coop-uspto.gov",
    "cooperativepatentclassification.org",
    "cooperhewitt.org",
    "copyright.gov",
    "coralreef.gov",
    "cosponsor.gov",
    "counterwmd.gov",
    "cpars.gov",
    "cpnireporting.gov",
    "cpsc.gov",
    "crimesolutions.gov",
    "crimevictims.gov",
    "crs.gov",
    "crt2014-2024review.gov",
    "csb.gov",
    "csce.gov",
    "csosa.fed.us",
    "csosa.gov",
    "cttso.gov",
    "cuidadodesalud.gov",
    "cupcao.gov",
    "cwc.gov",
    "cybercrime.gov",
    "d13cgaux.com",
    "dallasfed.org",
    "data.gov",
    "dcpsa.gov",
    "dcsc.gov",
    "dea.gov",
    "deadiversion.gov",
    "deals.gov",
    "deamuseum.org",
    "defense.gov",
    "defensetv.tv",
    "democraticleader.gov",
    "democraticwhip.gov",
    "democrats.gov",
    "dems.gov",
    "denali.gov",
    "dfafacts.gov",
    "dhhs.gov",
    "dhs-summit.us",
    "dhs.gov",
    "diabetescommittee.gov",
    "dietaryguidelines.gov",
    "digitalgov.gov",
    "digitalliteracy.gov",
    "digitalpreservation.gov",
    "digitalstewardship.gov",
    "digitalvaults.org",
    "digitizationguidelines.gov",
    "directoasucuenta.gov",
    "disability.gov",
    "disasterassistance.gov",
    "disastercontractingassistance.gov",
    "disasterhousing.gov",
    "distracteddriving.gov",
    "distraction.gov",
    "dna.gov",
    "dnfsb.gov",
    "dni.gov",
    "dnsops.gov",
    "doc.gov",
    "docline.gov",
    "docsteach.org",
    "dod.gov",
    "dodccrp.org",
    "dodea.edu",
    "dodsbir.net",
    "dodstarbase.org",
    "doe.gov",
    "doeal.gov",
    "doi.gov",
    "doioig.gov",
    "dol-esa.gov",
    "dol.gov",
    "doleta.gov",
    "donotcall.gov",
    "dontserveteens.gov",
    "dot.gov",
    "dotgov.gov",
    "dotideahub.gov",
    "dottrafficrecords.gov",
    "dottrcc.gov",
    "dra.gov",
    "drought.gov",
    "drugabuse.gov",
    "drugfreeworkplace.gov",
    "drywallresponse.gov",
    "dsac.gov",
    "dtv.gov",
    "dvbic.org",
    "dvidshub.net",
    "e-qip.gov",
    "e3.gov",
    "eac.gov",
    "eaclearinghouse.gov",
    "earmarks.gov",
    "earthkam.ucsd.edu",
    "earthquake.gov",
    "earthsystemcog.org",
    "earthsystemmodeling.org",
    "ecfr.gov",
    "economicinclusion.gov",
    "econsumer.gov",
    "ecopartnerships.gov",
    "ecpic.gov",
    "ecr.gov",
    "ed.gov",
    "eda.gov",
    "edison.gov",
    "edpubs.gov",
    "education.gov",
    "educationjobsfund.gov",
    "eeoc.gov",
    "efaca.gov",
    "eforms.gov",
    "eftps.gov",
    "egov.gov",
    "eia.gov",
    "eisenhowermemorial.gov",
    "elcivicsonline.org",
    "eldercare.gov",
    "emergency-federal-register.gov",
    "employeeexpress.gov",
    "empowhr.gov",
    "ems.gov",
    "endingthedocumentgame.gov",
    "energy.gov",
    "energycodes.gov",
    "energyplus.gov",
    "energysaver.gov",
    "energysavers.gov",
    "energystar.gov",
    "eng.embassyusa.cn",
    "enviroflash.info",
    "eop.gov",
    "epa-echo.gov",
    "epa-otis.gov",
    "epa.gov",
    "epls.gov",
    "erdc.gov",
    "errp.gov",
    "esa.gov",
    "esc.gov",
    "eseclab.gov",
    "espanol.gov",
    "espanolforlawenforcement.gov",
    "esrs.gov",
    "eta-find.gov",
    "ethics.gov",
    "ethicsburg.gov",
    "ets.prod.carlson.com",
    "evergladesrestoration.gov",
    "execsec.gov",
    "exim.gov",
    "eximcoop.gov",
    "exploretsp.gov",
    "export.gov",
    "exrwh.gov",
    "eyenote.gov",
    "faa.gov",
    "faasafety.gov",
    "faca.gov",
    "facadatabase.gov",
    "fafsa.gov",
    "fai.gov",
    "fairhousingfirst.org",
    "fan.gov",
    "fanniemae.com",
    "fapiis.gov",
    "faq.gov",
    "fara.gov",
    "farmcreditbank.com",
    "farmerclaims.gov",
    "farmermac.com",
    "fasab.gov",
    "fatherhood.gov",
    "fbi.gov",
    "fbiacademy.edu",
    "fbiic.gov",
    "fbijobs.gov",
    "fbo.gov",
    "fca.gov",
    "fcc.gov",
    "fcc.us",
    "fccuniversity.gov",
    "fcg.gov",
    "fcic.gov",
    "fcsic.gov",
    "fcsm.gov",
    "fd.org",
    "fda.gov",
    "fdic.gov",
    "fdicbets.gov",
    "fdicconnect.gov",
    "fdicig.gov",
    "fdicoig.gov",
    "fdicsales.gov",
    "fdicseguro.gov",
    "fdlp.gov",
    "fdms.gov",
    "fdr.gov",
    "fdrlibrary.marist.edu",
    "fdsys.gov",
    "feb.gov",
    "fec.gov",
    "fed.us",
    "fedbizopps.gov",
    "fedcentennial.gov",
    "fedcenter.gov",
    "fedcir.gov",
    "federalaccountability.gov",
    "federalcourts.gov",
    "federalinvestments.gov",
    "federaljobs.gov",
    "federallabs.org",
    "federalmentoringcouncil.gov",
    "federalprobation.gov",
    "federalregister.gov",
    "federalreporting.gov",
    "federalreserve.gov",
    "federalreserve100.gov",
    "federalreserve2013.gov",
    "federalreservecentennial.gov",
    "federalreservecentennialcelebration.gov",
    "federalreserveconsumerhelp.gov",
    "federalreserveeducation.org",
    "federalrules.gov",
    "federaltransparency.gov",
    "fedforms.gov",
    "fedidcard.gov",
    "fedinfo.gov",
    "fedinvest.gov",
    "fedjobs.gov",
    "fedpartnership.gov",
    "fedramp.gov",
    "fedrcc.us",
    "fedrealestate.gov",
    "fedreg.gov",
    "fedrooms.gov",
    "fedshirevets.gov",
    "fedstats.gov",
    "feedthefuture.gov",
    "fegli.gov",
    "fema.gov",
    "femalefarmerclaims.gov",
    "ferc.gov",
    "fercalt.gov",
    "fero.gov",
    "ffiec.gov",
    "fgdc.gov",
    "fha.gov",
    "fhfa.gov",
    "fhfaoig.gov",
    "fhfb.gov",
    "fhlb-of.com",
    "fhlb-pgh.com",
    "fhlb.com",
    "fhlbanks.com",
    "fhlbatl.com",
    "fhlbboston.com",
    "fhlbc.com",
    "fhlbcin.com",
    "fhlbdm.com",
    "fhlbi.com",
    "fhlbny.com",
    "fhlbsea.com",
    "fhlbsf.com",
    "fhlbtopeka.com",
    "fido.gov",
    "fightingmalaria.gov",
    "financialresearch.gov",
    "financialstability.gov",
    "fincen.gov",
    "findtbresources.org",
    "findyouthinfo.gov",
    "firecode.gov",
    "fireinstitute.gov",
    "firelab.org",
    "fireleadership.gov",
    "firenet.gov",
    "firescience.gov",
    "firstfreedom.gov",
    "firstgov.gov",
    "firstnet.gov",
    "firstresponder.gov",
    "firstrespondertraining.gov",
    "fiscalcommission.gov",
    "fishwatch.gov",
    "fitness.gov",
    "fjc.gov",
    "fleta.gov",
    "fletc.gov",
    "flightschoolcandidates.gov",
    "floodsmart.gov",
    "flra.gov",
    "flu.gov",
    "fmc.gov",
    "fmcs.gov",
    "fmi.gov",
    "fmip.gov",
    "fmshrc.gov",
    "fnal.gov",
    "foia.gov",
    "foodsafety.gov",
    "foodsafetyjobs.gov",
    "foodsafetyworkinggroup.gov",
    "fordlibrarymuseum.gov",
    "foreignassistance.gov",
    "forest.moscowfsl.wsu.edu",
    "forestryimages.org",
    "forestsandrangelands.gov",
    "forfeiture.gov",
    "forms.gov",
    "fpds.gov",
    "fpki-lab.gov",
    "fpki.gov",
    "frb.fed.us",
    "frb.gov",
    "frbatlanta.org",
    "frbsf.org",
    "frc.gov",
    "frcc.gov",
    "freddiemac.com",
    "freecreditreport.gov",
    "frpp-pa.gov",
    "frs.gov",
    "frtib.gov",
    "frtibtest.gov",
    "frtr.gov",
    "fruitsandveggiesmatter.gov",
    "fs.fed.us",
    "fsafeds.com",
    "fsafeds.gov",
    "fsapubs.gov",
    "fsd.gov",
    "fsgb.gov",
    "fsoc.gov",
    "fsrs.gov",
    "fswg.gov",
    "ftc.gov",
    "ftccomplaintassistant.gov",
    "ftcefile.gov",
    "fttesttwai.gov",
    "fueleconomy.gov",
    "fvap.gov",
    "fws.gov",
    "g5.gov",
    "gao.gov",
    "gaonet.gov",
    "gcdamp.gov",
    "gcmrc.gov",
    "genbank.gov",
    "genome.gov",
    "geocommunicator.gov",
    "geomac.gov",
    "geoplatform.gov",
    "georgewbushlibrary.gov",
    "georgewbushlibrary.smu.edu",
    "getinvolved.gov",
    "getsmartaboutdrugs.com",
    "getsmartaboutdrugs.gov",
    "getyouhome.gov",
    "ghi.gov",
    "ginniemae.gov",
    "girlshealth.gov",
    "globalchange.gov",
    "globalentry.gov",
    "globalhealth.gov",
    "globe.gov",
    "goang.com",
    "goarmy.com",
    "gobierno.gov",
    "gobiernousa.gov",
    "gocivilairpatrol.com",
    "gocoastguard.com",
    "godirect.gov",
    "godirect.org",
    "goes-r.gov",
    "golearn.gov",
    "gop.gov",
    "gopconference.gov",
    "gopleader.gov",
    "govbenefits.gov",
    "governmentjobs.gov",
    "govinfo.gov",
    "govloans.gov",
    "govsales.gov",
    "gpo.gov",
    "gpoaccess.gov",
    "gps.gov",
    "grants.gov",
    "grantsolutions.gov",
    "green.gov",
    "greengov.gov",
    "gsa.gov",
    "gsaadvantage.gov",
    "gsaauctions.gov",
    "gsadvantage.gov",
    "gsaig.gov",
    "gsaxcess.gov",
    "guideline.gov",
    "guidelines.gov",
    "gulfofmexicoalliance.org",
    "gwa.gov",
    "hanford.gov",
    "harp.gov",
    "hc.gov",
    "hcqualitycommission.gov",
    "health.gov",
    "healthcare.gov",
    "healthdata.gov",
    "healthfinder.gov",
    "healthindicators.gov",
    "healthit.gov",
    "healthreform.gov",
    "healthypeople.gov",
    "hearttruth.gov",
    "helpingamericasyouth.gov",
    "helpwithmybank.gov",
    "helpwithmycheckingaccount.gov",
    "helpwithmycreditcard.gov",
    "helpwithmycreditcardbank.gov",
    "helpwithmymortgage.gov",
    "helpwithmymortgagebank.gov",
    "heritageabroad.gov",
    "hhs.gov",
    "hhsoig.gov",
    "hhsops.gov",
    "highperformancebuildings.gov",
    "hill.gov",
    "hispanicfarmerclaims.gov",
    "hispanicheritagemonth.gov",
    "history.gov",
    "hiv.gov",
    "homeenergyscore.gov",
    "homelandsecurity.conferenceon.tv",
    "homelandsecurity.gov",
    "homesales.gov",
    "house.gov",
    "housecalendar.gov",
    "housecommunications.gov",
    "housedemocrats.gov",
    "housedems.gov",
    "houselive.gov",
    "housenewsletters.gov",
    "howto.gov",
    "hrsa.gov",
    "hru.gov",
    "hsa.gov",
    "hsdl.org",
    "hsr.gov",
    "hubblesite.org",
    "hud.gov",
    "hudhomestore.com",
    "hudnsphelp.info",
    "hudoig.gov",
    "huduser.org",
    "humanities.gov",
    "humanrights.gov",
    "hurricanes.gov",
    "hydrogen.gov",
    "iab.gov",
    "iad.gov",
    "iaf.gov",
    "iarpa-ideas.gov",
    "iarpa.gov",
    "iat.gov",
    "iawg.gov",
    "ibb.gov",
    "ibwc.gov",
    "ic.gov",
    "ic3.gov",
    "icass.gov",
    "icbemp.gov",
    "ice.gov",
    "ich.gov",
    "icjointduty.gov",
    "identitytheft.gov",
    "idmanagement.gov",
    "idtheft.gov",
    "iedison.gov",
    "ignet.gov",
    "igs.org",
    "ihs.gov",
    "iiog.gov",
    "imls.gov",
    "indianaffairs.gov",
    "inel.gov",
    "info.gov",
    "inl.gov",
    "insidevoa.com",
    "insurekidsnow.gov",
    "integrity.gov",
    "intelink.gov",
    "intelligence.gov",
    "interior.gov",
    "interpol.gov",
    "invasivespecies.gov",
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]

Sourced from http://govt-urls.usa.gov/tematres/vocab/index.php?tema=17 and http://govt-urls.usa.gov/tematres/vocab/index.php?tema=11928