Here is list of all the generic top-level domains (gTLDs) and country-code top-level domains (ccTLDs). A link to a CSV file containing the list is available at the end of the post.
Generic Top-Level Domains (gTLDs)
.aero - Air transport
.asia - Organisations and individuals in the Asia-Pacific region
.biz - Business
.cat - Catalan
.com - Commercial organizations
.coop - Cooperatives
.edu - Post-secondary educational establishments
.gov - US government
.info - Informational sites
.int - International organizations
.jobs - Employment-related sites
.mil - US military
.mobi - Mobile
.museum - Museums
.name - Families and individuals
.net - Network
.org - Non-profit organizations
.pro - Profession
.tel - Telephone
.travel - Travel
Country Code Top-Level Domains (ccTLDs)
A
.ac - Ascension Island
.ad - Andorra
.ae - United Arab Emirates
.af - Afghanistan
.ag - Antigua and Barbuda
.ai - Anguilla
.al - Albania
.am - Armenia
.an - Netherlands Antilles
.ao - Angola
.aq - Antarctica
.ar - Argentina
.as - American Samoa
.at - Austria
.au - Australia
.aw - Aruba
.ax - Åland Islands
.az - Azerbaijan
B
.ba - Bosnia and Herzegovina
.bb - Barbados
.bd - Bangladesh
.be - Belgium
.bf - Burkina Faso
.bg - Bulgaria
.bh - Bahrain
.bi - Burundi
.bj - Benin
.bl - Saint Barthélemy
.bm - Bermuda
.bn - Brunei
.bo - Bolivia
.br - Brazil
.bs - Bahamas
.bt - Bhutan
.bv - Bouvet Island
.bw - Botswana
.by - Belarus
.bz - Belize
C
.ca - Canada
.cc - Cocos (Keeling) Islands
.cd - Democratic Republic of the Congo
.cf - Central African Republic
.cg - Republic of the Congo
.ch - Switzerland
.ci - Côte d'Ivoire
.ck - Cook Islands
.cl - Chile
.cm - Cameroon
.cn - People's Republic of China
.co - Colombia
.cr - Costa Rica
.cu - Cuba
.cv - Cape Verde
.cx - Christmas Island
.cy - Cyprus
.cz - Czech Republic
D
.de - Germany
.dj - Djibouti
.dk - Denmark
.dm - Dominica
.do - Dominican Republic
.dz - Algeria
E
.ec - Ecuador
.ee - Estonia
.eg - Egypt
.eh - Western Sahara
.er - Eritrea
.es - Spain
.et - Ethiopia
.eu - European Union
F
.fi - Finland
.fj - Fiji
.fk - Falkland Islands
.fm - Federated States of Micronesia
.fo - Faroe Islands
.fr - France
G
.ga - Gabon
.gb - United Kingdom
.gd - Grenada
.ge - Georgia
.gf - French Guiana
.gg - Guernsey
.gh - Ghana
.gi - Gibraltar
.gl - Greenland
.gm - Gambia
.gn - Guinea
.gp - Guadeloupe
.gq - Equatorial Guinea
.gr - Greece
.gs - South Georgia and the South Sandwich Islands