The following ISBN ranges have at least 2000 books/other media listed in this site:

HarperCollins
Various small imprints
Macmillan
Holt McDougal
HarperCollins
HarperCollins
McGraw-Hill
Pergamon Press
Random House
Stationery Office Books
Academic Press
Prentice Hall
Penguin
Harcourt
U.S. Government Printing Office
Oxford University Press
Addison-Wesley
Allyn and Bacon
Stationery Office Books
University of Chicago Press
Macmillan
Columbia University Press
Hamish Hamilton
Forgotten Books
Indiana University Press
The MIT Press
Mills & Boon
Pearson Education
University of Washington Press
Weidenfeld & Nicolson
Yale University Press
Cassell
Da Capo Press
Alfred A. Knopf
Zondervan
St. Martin's Press
Greenwood
West Group
Hachette Book Group USA
UMI Books on Demand
UMI Books on Demand
Ordnance Survey
Addison-Wesley
Mosby
South-Western College Publications
Scott Foresman
Pan Books
Palgrave Macmillan
Open University Press
Stationery Office Books
Hodder & Stoughton
Ballantine Books
Star
Cengage Learning
Routledge
Harlequin Books
Farrar, Straus and Giroux
Random House
Avon Books
Doubleday
Springer
McGraw-Hill
W. W. Norton & Company
Random House
Houghton Mifflin
Lippincott Williams & Wilkins
Penguin Putnam
Butterworths Law
Chapman and Hall
Routledge
Berkley
Heinemann
Scholastic
Dell
Ace
Churchill Livingstone
Elsevier Science
Grand Central Publishing
Signet
Basic Books
Wiley
Wiley
Dover Publications
Wadsworth; Brooks/Cole
Thames and Hudson Ltd
Cambridge University Press
Crown Publishers
University of California Press
Cambridge University Press
Dutton
HarperCollins
Wadsworth; Brooks/Cole
Pearson Custom Publishing
Cengage Learning
HOUGHTON MIFFLIN HARCOURT
Scholastic
HOUGHTON MIFFLIN HARCOURT
Marshall Pickering
Corgi
Bantam
BBC
Faber & Faber
Gollancz
Longman
Scholastic
Bantam Press
iUniverse, Inc.
Various small imprints
HOUGHTON MIFFLIN
Various small imprints
Wiley-Blackwell
Hal Leonard
Gallopade
Australian Govt. Pub. Service
Various small imprints
Viking
Simon & Schuster
Harvard University Press
Random House
Scribners
William Morrow and Company
Simon & Schuster
Princeton University Press
Various small imprints
Better Homes and Gardens
McGraw-Hill
Churchill Livingstone
Futura Publications
Routledge
Jane's Information Group
Ian Allan Publishing
A & C Black Publishers Ltd
Phaidon Press
HSE Books
Thomas Nelson
Saunders
Mosby
Prentice Hall
Arcadia Publishing
Random House Audio
Andrews McMeel Publishing
Simon & Schuster
Pocket Books
Usborne Publishing Ltd
Bloomsbury Publishing PLC
Kogan Page
Piatkus
Butterworth-Heinemann
Sphere
The History Press
Orion
Headline
DK Children
Kendall Hunt Publishing
Motorbooks
SAGE Publications
Running Press
Globe Pequot
Candlewick
Jones & Bartlett Learning
Barrons Educational Series
Bethany House Publishers
Schiffer Publishing, Ltd
John Wiley & Sons
Tom Doherty Associates
McClelland & Stewart
LWW
Marvel
Thomas Nelson Inc
French & European Pubns
McFarland & Company
Hyperion
Jossey-Bass
Que Pub
ASME Press (American Society of Mechanical Engineers)
Springer
John Curley & Associates
Kaplan Business
Baker Book House
Cornell University Press
Johns Hopkins University Press
Chilton Book Co
Eerdmans
University of Nebraska Press
F.A. Davis Company
Random House
Stanford University Press
Henry Holt and Company
Benjamin Cummings
University of Oklahoma Press
CCH Inc.
Harry N. Abrams
Chronicle Books
Routledge
Birkhauser
Amer Mathematical Society
Duke University Press Books
CRC Press
Editorial Portavoz
Springer Publishing Company
Continuum
RAND Corporation
Tyndale House Publishers
Rizzoli
CRC Press
Paintedicons
Factory Direct
1-05
Factory Direct
Independently published
Independently published
Independently published
Cambridge University Press
Cambridge University Press
Cengage Learning
Cornell University Library
Wiley
Wiley
McGraw Hill
Cengage Learning
Palgrave Macmillan
Routledge
Nabu Press
Nabu Press
Nabu Press
Nabu Press
Nabu Press
Nabu Press
Various small imprints
St. Martin's Press
McGraw-Hill Education
McGraw-Hill Education
Pearson
Jones & Bartlett Learning
Cengage Learning
Cengage Learning
Routledge
Bedford/St. Martin's
Blurb
Cengage Learning
Routledge
Random House
Tantor Audio
DC Comics
Cengage Learning
Springer
Sourcebooks
Sterling
Palgrave Macmillan
Wiley-Blackwell
Egmont Books Ltd
Dorling Kindersley
Pearson Education
Scholastic
A & C Black Publishers Ltd
BBC Physical Audio
SAGE Publications
Tyndale House Publishers, Inc.
Saunders
Simon & Schuster
Simon & Schuster
VIZ Media LLC
1st World Library - Literary Society
LexisNexis
Disney Press
Brilliance Audio
Hal Leonard
Apress
Blackstone Audio, Inc.
Crossway
Holman Bible Publishers
Barnes & Noble
Simon & Schuster
CRC Press
Rowman & Littlefield Publishers
University of Toronto Press, Scholarly Publishing Division
Hodder & Stoughton
Paragon
Pearson Education
Various small imprints
LWW
Wolters Kluwer
Grand Central Publishing
Saunders
Brilliance Audio
CreateSpace Independent Publishing Platform
Bedford/St. Martin's
Springer
Crossbooks
Worth Publishers
Kendall Hunt Publishing
CRC Press
LWW
Hodder Education
Simon & Schuster
CreateSpace Independent Publishing Platform
Brilliance Audio
Brilliance Audio
Springer
LWW
CRC Press
International Business Publications, Inc.
CreateSpace Independent Publishing Platform
Nova Science Pub Inc
Hachette
Seuil
Larousse
Michelin Editions des Voyages
Gallimard
Flammarion
Okaycosama
Dunod
Presses Universitaires de France - PUF
Casterman
L'Ecole des loisirs
Eyrolles
Fayard
Hatier
Robert Laffont
Albin Michel
Grasset
Dalloz
Le Livre de Poche
10 X 18
Pocket
Harlequin
J'ai lu
Marabout
Glénat
Ellipses Marketing
Actes Sud
Micro Application
PEARSON (France)
Editions Milan
Delcourt
Points
E.R.P.I.
Héritage
Les Éditions Québec-Livres
Dupuis
岩波書店
4-04
学習研究社
講談社
集英社
小学館
新潮社
中央公論新社
早川書房
文藝春秋
河出書房新社
幻冬舎
Springer
ダイヤモンド社
筑摩書房
4-532
PHP研究所
Eksmo
5-08
Eksmo
Foreign Languages Press
Wiley India
Wydawnictwo Naukowe
WSiP
Zaklad Narodowy im. Ossolińskich
83-08
Bellona
Wydawnictwo Uniwersytetu Wroc&
Wydawnictwo Uniwersytetu Jagiellonskiego
Egmont
Znak
Amber
83-245
Helion
C.H. Beck
Wolters Kluwer
Olesiejuk
Planeta
Editora y Distribuidora Hispano Americana, S.A.
Timun Mas
Record
Companhia das Letras
Mondadori
Einaudi
Feltrinelli
Zanichelli
Giunti Editore
EDB
Il Mulino
Rizzoli
Longanesi
Mondadori Electa
Paravia
Il Capitello
Springer Verlag
TEA
Brill
Boekerij, De
Wolters Kluwer
Bonnier
Norstedt
LiberFörlag
91-554
92-0
United Nations
ILO
UNESCO
World Health Organization
92-5
Organization for Economic
European Communities / Union (EUR-OP/OOPEC/OPOCE)
European Communities
European Communities / Union (EUR-OP/OOPEC/OPOCE)
92-828
Council of Europe
SanDisk
Akadémiai Kiadó
Szépirodalmi Könyvkiadó
Porrua
McGraw-Hill Interamericana
Mugz Game
Springer
Springer