This is a list of the oldest extant registered generic top-level domains used in the Domain Name System of the Internet.

Until 1986, Domain Registration was limited to organizations with access to ARPANET. The possibility of registration of UUCPNET, BITNET and CSNET hosts was announced in February 1986.

.com

Rank Date of registration Domain Registered to +fj 1 symbolics.comSymbolics 2 bbn.com BBN Technologies 3 think.com Thinking Machines 4 mcc.com Microelectronics and Computer Technology Corporation 5 dec.com Digital Equipment Corporation 6 northrop.com Northrop Corporation 7 xerox.com Xerox PARC 8 sri.com SRI International 9 hp.com Hewlett-Packard 10 bellcore.com Bell Communications Research 11 ibm.com IBM 12 sun.com Sun Microsystems 13 intel.com Intel 14 ti.com Texas Instruments 15 att.com AT&T 16 gmr.com General Motors Research Laboratories 17 tek.com Tektronix 18 fmc.com FMC Corporation 19 ub.com Ungermann-Bass 20 bell-atl.com Bell Atlantic 21 ge.com General Electric 22 grebyn.com Grebyn Corporation 23 isc.com Interactive Systems Corporation 24 nsc.com National Semiconductor 25 stargate.com Stargate Information Services 26 boeing.com Boeing 27 itcorp.com Interrupt Technology Corporation 28 siemens.com Siemens AG 29 pyramid.com Pyramid Technology 30 alphacdc.com Alpha Communications Development Corporation 31 bdm.com BDM Corporation 32 fluke.com Fluke Corporation 33 inmet.com Intermetrics 34 kesmai.com Kesmai 35 mentor.com Mentor Graphics 36 nec.com NEC Corporation 37 ray.com Raytheon 38 rosemount.com Rosemount Inc. 39 vortex.com Vortex Technology 40 alcoa.com Alcoa 41 gte.com General Telephone and Electronics 42 adobe.com Adobe Systems 43 amd.com Advanced Micro Devices (AMD) 44 das.com DA Systems, Inc. 45 data-io.com Data I/O Corporation 46 octopus.com Octopus Enterprises 47 portal.com Portal Communications Company 48 teltone.com Teltone Corporation 49 3com.com 3Com Corporation 50 amdahl.com Amdahl Corporation 51 ccur.com Concurrent Computer Corporation 52 ci.com Cognition, Inc. 53 convergent.com Convergent Technologies 54 dg.com Data General 55 peregrine.com Peregrine Systems 56 quad.com Quadratron Systems Inc. 57 sq.com SoftQuad 58 tandy.com Tandy Corporation 59 tti.com Citicorp/TTI 60 unisys.com Unisys 61 cgi.com Carnegie Group Inc. 62 cts.com Crash TimeSharing 63 spdcc.com S.P. Dyer Computer Consulting 64 apple.com Apple Computer 65 nma.com Network Management Associates 66 prime.com Prime Computer 67 philips.com Philips 68 datacube.com Datacube Inc. 69 kai.com Kuck and Associates, Inc. 70 tic.com Texas Internet Consulting 71 vine.com Vine Technology 72 ncr.com NCR Corporation 73 cisco.com Cisco Systems 74 rdl.com Research Development Laboratories 75 slb.com Schlumberger Limited 76 parcplace.com ParcPlace Systems, Inc. 77 utc.com United Technologies Corporation 78 ide.com Interactive Development Environments 79 trw.com TRW 80 unipress.com Unipress Software 81 dupont.com DuPont 82 lockheed.com Lockheed Corporation 83 rosetta.com Rosetta Consulting 84 toad.com John Gilmore 85 quick.com Quicksilver Engineering 86 allied.com AlliedSignal 87 dsc.com Digital Sound Corporation 88 sco.com Santa Cruz Operation 89 gene.com Genentech 90 kccs.com KC Computer Sciences 91 spectra.com Spectragraphics Corporation 92 wlk.com W.L. Kennedy Jr. & Associates 93 mentat.com Mentat Inc. 94 wyse.com Wyse Technology 95 cfg.com Caine, Farber & Gordon, Inc. 96 marble.com Marble Associates, Inc. 97 cayman.com Cayman Systems, Inc. 98 entity.com Entity Cyber, Inc. 99 ksr.com Kendall Square Research 100 nynexst.com NYNEX Science & TechnologySources:

.org

Rank Date of registration Domain Registered to1 mitre.org Mitre Corporation2 darpa.org DARPA3 src.org Semiconductor Research Corporation4 super.org Center for Computing Sciences5 aero.org The Aerospace Corporation6 mcnc.org Microelectronics Center of North Carolina7 rand.org RAND Corporation8 mn.org SkyPoint Communications9 rti.org RTI International10 usenix.org USENIX11 software.org BSA Foundation (launched by Software Alliance)12 fidonet.org FidoNet 13 ampr.org AMPRNet 14 osf.org Open Software Foundation 15 ida.org Institute for Defense Analyses 16 cactus.org Capital Area Central Texas Unix Society 17 nm.org New Mexico Technet 18 ccf.org Cleveland Clinic 19 erim.org Environmental Research Institute of Michigan 20 ski.org Smith-Kettlewell Eye Research Institute 21 iti.org 22 jax.org Jackson Laboratory 23 ncsc.org National Center for State Courts 24 aaai.org Association for the Advancement of Artificial Intelligence 25 ie.org 26 stjude.org St. Jude Children's Research Hospital 27 mbari.org Monterey Bay Aquarium Research Institute 28 castle.org 29 carl.org 30 msri.org Mathematical Sciences Research Institute 31 agi.org 32 sf-bay.org Scott Hazen Mueller 33 mef.org 34 oclc.org Online Computer Library Center 35 ei.org 36 cas.org Chemical Abstracts Service 37 battelle.org Battelle Memorial Institute 38 sub.org 39 aip.org American Institute of Physics 40 sdpa.org 41 lonestar.org 42 ieee.org Institute of Electrical and Electronics Engineers 43 cit.org 44 sematech.org SEMATECH 45 omg.org 46 decus.org 47 sublink.org 48 cam.org 49 cpl.org Cleveland Public Library 50 ori.org Oregon Research Institute 51 fhcrc.org Fred Hutchinson Cancer Research Center 52 nwf.org National Wildlife Federation 53 mskcc.org 54 boystown.org Boys Town 55 bwc.org 56 topsail.org 57 ciit.org 58 central.org 59 mind.org 60 stonemarche.org 61 cshl.org 62 fstrf.org 63 dorsai.org 64 elf.org 65 siggraph.org SIGGRAPH 66 sjh.org 67 igc.org Institute for Global Communications 68 cotdazr.org 69 eff.org Electronic Frontier Foundation 70 sfn.org Society for Neuroscience 71 csn.org 72 sfbr.org 73 ais.org 74 hjf.org 75 uniforum.org 76 wgbh.org WGBH Educational Foundation 77 fsf.org Free Software Foundation 78 eso.org European Southern Observatory 79 tiaa.org Teachers Insurance and Annuity Association of America 80 nysernet.org NYSERNet 81 acr.org American College of Radiology 82 nybc.org New York Blood Center 83 nypl.org New York Public Library 84 cnytdo.org 85 htr.org 86 hvtdc.org 87 nycp.org 88 bpl.org Boston Public Library 89 scra.org South Carolina Research Authority 90 amnh.org American Museum of Natural History 91 hellnet.org 92 sil.org SIL International 93 apc.org 94 mobot.org Missouri Botanical Garden 95 cni.org Coalition for Networked Information 96 gumption.org 97 hslc.org 98 guild.org 99 acs.org American Chemical Society 100 lpl.org Sources:

.edu Registration within .edu is restricted to accredited educational institutions. Prior to October 2001, registration was available worldwide; it has since been limited to institutions based in the United States. Rank Date of registration Domain Registered to1 berkeley.edu University of California, Berkeley1 cmu.edu Carnegie Mellon University1 purdue.edu Purdue University1 rice.edu Rice University1 ucla.edu University of California, Los Angeles6 rutgers.edu Rutgers University7 mit.edu Massachusetts Institute of Technology8 harvard.edu Harvard University9 columbia.edu Columbia University10 cornell.edu Cornell University11 uiuc.edu University of Illinois at Urbana–Champaign12 udel.edu University of Delaware13 umd.edu University of Maryland, College Park14 utexas.edu University of Texas at Austin15 usc.edu University of Southern California16 wisc.edu University of Wisconsin–Madison16 uci.edu University of California, Irvine18 stanford.edu Stanford University19 umich.edu University of Michigan20 ucsd.edu University of California, San Diego21 caltech.edu California Institute of Technology22 arizona.edu University of Arizona23 ucsf.edu University of California, San Francisco24 dartmouth.edu Dartmouth College24 indiana.edu Indiana University Bloomington24 okstate.edu Oklahoma State University24 unlv.edu University of Nevada, Las Vegas24 wfu.edu Wake Forest University24 wright.edu Wright State University30 isi.edu Information Sciences Institute31 ucdavis.edu University of California, Davis31 uta.edu University of Texas at Arlington31 virginia.edu University of Virginia34 ufl.edu University of Florida34 bu.edu Boston University34 rpi.edu Rensselaer Polytechnic Institute34 umass.edu University of Massachusetts Amherst34 northeastern.edu Northeastern University40 gatech.edu Georgia Institute of Technology40 toronto.edu University of Toronto40 sju.edu Saint Joseph's University40 uab.edu University of Alabama at Birmingham44 carleton.edu Carleton College44 duke.edu Duke University44 upenn.edu University of Pennsylvania44 emory.edu Emory University44 bgsu.edu Bowling Green State University44 colorado.edu University of Colorado Boulder50 unc.edu University of North Carolina at Chapel Hill51 usd.edu University of South Dakota51 uwp.edu University of Wisconsin–Parkside51 wellesley.edu Wellesley College51 wku.edu Western Kentucky University55 psu.edu Pennsylvania State University56 brown.edu Brown University56 unm.edu University of New Mexico58 syr.edu Syracuse University58 depaul.edu DePaul University60 washington.edu University of Washington60 wcslc.edu Westminster College (university since 2023)62 moravian.edu Moravian College62 unt.edu University of North Texas62 usf.edu University of South Florida62 williams.edu Williams College66 merit.edu Merit Network67 nyu.edu New York University68 rochester.edu University of Rochester69 unh.edu University of New Hampshire69 ucf.edu University of Central Florida69 hawaii.edu University of Hawaii69 csufresno.edu California State University, Fresno73 georgetown.edu Georgetown University73 muskingum.edu Muskingum University73 odu.edu Old Dominion University76 usma.edu United States Military Academy77 clarkson.edu Clarkson University78 oberlin.edu Oberlin College78 ohiou.edu Ohio University78 unr.edu University of Nevada, Reno81 utah.edu University of Utah82 byu.edu Brigham Young University82 lsu.edu Louisiana State University84 umn.edu University of Minnesota85 ucsc.edu University of California, Santa Cruz86 bsu.edu Ball State University86 csuchico.edu California State University, Chico86 kent.edu Kent State University86 clemson.edu Clemson University90 albany.edu University at Albany91 whoi.edu Woods Hole Oceanographic Institution92 mu.edu Marquette University93 yale.edu Yale University94 jhu.edu Johns Hopkins University95 rockefeller.edu The Rockefeller University96 princeton.edu Princeton University97 yu.edu Yeshiva University98 wsu.edu Washington State University98 wwu.edu Western Washington University98 uvm.edu University of Vermont98 tulane.edu Tulane University

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