There are occasions when it is useful to know about the barcode practices of another library in order to avoid inadvertent duplication of patron or item barcode values. In order to assist Maine libraries, the Maine InfoNet maintains this reference list.

This site lists unique codes for libraries in Maine using the 14-digit codabar convention, wherein patron barcodes begin with a “2” and item barcodes with a “3” – in both cases followed by a 4-digit institutional code then an 8-digit unique sequential number followed by a MOD 10 check digit. When ordering new barcodes from a vendor, please avoid alphabet characters and stick with just numbers as this makes the systems work more smoothly.

The table below lists those 4-digit codes.  Additions and corrections should be sent to James.JacksonSanborn@maine.edu.

Libraries are listed in barcode order. To find a specific library, please use ctrl + f to search the page.

Barcode Symbols List for Libraries (in numerical order)

• 0129 Auburn Public Library
• 0348 Gibbs Library — Washington
• 0567 Stockton Springs Community Library
• 0500 Denmark Public Library
• 1000 George E. Jack Elementary School
• 1111 Southwest Harbor Public Library
• 1125 Kingman Elementary School
• 1198 Edward Little HS
• 1220 Portland Public Library
• 1234 Guy E. Rowe School
• 1262 Hermon Elementary School
• 1263 Hermon Middle School
• 1264 Hermon High School
• 1270 Spruce Mountain Middle School
• 1271 Spruce Mountain High School
• 1272 Spruce Mountain Elementary School
• 1273 Spruce Mountain Primary School
• 1331 York School Department
• 1390 USM
• 1496 Maine General Medical Center
• 1717 Cary Memorial Library — Wayne
• 1789 Cushing Library
• 1796 Blue Hill Public Library
• 1799 Wiscasset Public Library
• 1820 Grand Lodge of Masons in Maine Library
• 1823 Foxcroft Academy — Dover-Foxcroft
• 1847 Patten Free Library — Bath
• 1865 University of Maine (system-wide)
• 1872 Thomaston Public Library
• 1881 Gardiner Public Library
• 1888 Rice Public Library — Kittery
• 1891 Central Maine Medical Center — Lewiston
• 1892 Porter Memorial Library — Machias
• 1896 Camden Public Library
• 1903 Parsons Memorial Library
• 1904 Pittsfield Public Library
• 1906 Madison Public Library
• 1907 Kennebunk Free Library
• 1912 St. Joseph’s College
• 1916 Waldoboro Public Library
• 1919 East Blue Hill Library
• 1932 Vose Library — Union
• 1937 Louis B. Goodall Memorial Library — Sanford
• 1941 Maine Maritime Academy — Castine
• 1978 Winslow Public Library
• 1985 Waterboro Public Library
• 2000 Edna Libby Elementary School
• 2001 Windsor Elementary School
• 2003 Maine Criminal Justice Academy
• 2019 Augusta School Department (same as Lithgow PL – items only)
• 2019 Lithgow Public Library (same as Augusta School Dept.) – Augusta
• 2034 University of Maine Augusta
• 2202 Maine Medical Center Library
• 2220 Newburgh Community Library
• 2235 Beal College Library – Bangor
• 2288 Skidompha Public Library – Damariscotta
• 2299 Caribou High School
• 2325 Searsport Middle / High School
• 2375 Thomas Memorial Library – Cape Elizabeth
• 2454 University of Maine Farmington
• 2571 Turner Memorial Library – Presque Isle
• 2665 Oxford Hills HS – South Paris
• 3000 Steep Falls Elem. School
• 3177 Charlotte Hobbs Library – Lovell
• 3234 Oxford Elementary School
• 3248 Boothbay Harbor Public Library
• 3330 University of Maine at Presque Isle (ispc)
• 3365 Mercy Hospital Library – Portland
• 3631 Treat Memorial Library – Livermore Falls
• 3718 Augusta School Department (patrons)
• 3901 Berwick Public Library
• 3903 Thomas College
• 3906 DA Hurd Library – North Berwick
• 3907 Ogunquit Memorial Library
• 3909 York Public Library
• 3940 South Portland Public Library
• 3972 Old Town Public Library
• 3980 South Berwick Public Library
• 4002 Community Library – Lyman
• 4005 McArthur Library – Biddeford
• 4008 Bowdoinham Public Library
• 4009 Bridgton Public Library
• 4011 Curtis Memorial Library – Brunswick
• 4015 Casco Public Library
• 4020 Bonney Memorial Library – Cornish
• 4021 Prince Memorial Library – Cumberland
• 4032 Freeport Community Library
• 4037 Fryeburg Schools
• 4038 North Gorham Public Library
• 4039 Gray Public Library
• 4040 Harrison Village Library
• 4042 Hollis Center Public Library
• 4048 Limerick Public Library
• 4062 Windham Public Library
• 4064 Libby Memorial Library – Old Orchard Beach
• 4071 Raymond Village Library
• 4074 Scarborough Public Library
• 4079 Cundy’s Harbor Library
• 4083 Springvale Public Library
• 4084 Richville Library
• 4085 Steep Falls Library
• 4092 Walker Memorial Library – Westbrook
• 4093 West Buxton Public Library
• 4096 Merrill Memorial Library
• 4101 Mechanics’ Hall Library – Portland
• 4103 Kaplan University Maine
• 4105 Falmouth Memorial Library
• 4120 Longley
• 4130 Martel
• 4140 McMahon
• 4150 Montello
• 4160 Pettengill
• 4180 Lewiston Middle School
• 4190 Lewiston High School
• 4217 Bethel Library
• 4224 Ludden Memorial Library – Dixfield
• 4236 Morse Memorial Library – Greene
• 4240 Lewiston Public Library
• 4250 Lisbon Library Department
• 4259 Cumston Public Library – Monmouth
• 4268 Norway Memorial Library
• 4276 Rumford Public Library
• 4281 Paris Public Library
• 4289 West Paris Public Library
• 4294 Wilton Free Public Library
• 4333 Maine State Library Outreach Services
• 4353 Whitefield Library
• 4357 Umberhine Library – Richmond
• 4390 A. B. Ricker Memorial Library
• 4401 Colby College – previously part of Bangor Theological Seminary collection
• 4402 Eastern Maine Medical Center – Bangor
• 4403 Bangor School Department
  • 4403 Bangor High School Library (BHS)
  • 9001 Bangor High School
  • 9012 Bangor High School
  • 44031 James F. Doughty School Library (JFDS)
  • 44032 William S. Cohen School Library (WSCS)
  • 44033 Mary Snow School Library
  • 44034 Fairmount School Library
  • 44035 Fruit Street School Library
  • 44036 Abraham Lincoln School Library
  • 44037 Vine Street School Library
  • 44038 Fourteenth Street School Library
  • 44039 Downeast School Library
  • 44040 Bangor Regional School
• 4406 Guilford Memorial Library
• 4412 Brewer Public Library
• 4414 Brownville Free Public Library
• 4416 Buck Memorial Library – Bucksport
• 4418 Helen Dunn School – Greenbush
• 4419 Simpson Memorial Library – Carmel
• 4421 Witherle Memorial Library – Castine
• 4422 Charleston Public Library
• 4426 Thompson Free Library – Dover-Foxcroft
• 4438 Waldo Peirce Reading Room Library – Frankfort
• 4441 Shaw Public Library – Greenville
• 4443 Piscataquis Community Schools (SAD 4) – Guilford
• 4444 Edythe Dyer Community Library – Hampden
• 4450 Case Memorial Library – Kenduskeag
• 4463 Penquis Valley Schools (SAD 41) – Milo
• 4464 Monson Public Library
• 4469 Dorcas Library – Prospect Harbor
• 4473 Orono Public Library
• 4521 Wells Reserve Coastal Resource Library
• 4551 Bremen Library
• 4605 Ellsworth Public Library
• 4609 Jesup Memorial Library – Bar Harbor
• 4612 Bass Harbor Memorial Library
• 4616 Friend Memorial Public Library – Brooklin
• 4619 Calais Public Library
• 4622 Cherryfield Public Library
• 4627 Chase Emerson Memorial Library – Deer Isle
• 4630 Florence Sturdivant Public Library – East Machias
• 4631 Peavey Memorial Library – Eastport
• 4634 Franklin Public Library
• 4643 Gallison Memorial Library – Harrington
• 4648 Jonesboro Elementary School – Jonesboro
• 4652 Lubec Memorial Library
• 4654 Machias High School
• 4658 Milbridge Public Library
• 4660 Northeast Harbor Library
• 4662 Northeast Harbor Library
• 4664 Frenchman’s Bay Library
• 4666 Pembroke Library
• 4680 Henry D. Moore Library – Stuben
• 4681 Stonington Public Library
• 4685 Swan’s Island Library
• 4693 Winter Harbor
• 4736 Caribou Public Library
• 4742 Fort Fairfield Public Library
• 4747 Katahdin Public Library – Island Falls
• 4765 Veteran’s Memorial Library – Patten
• 4841 Rockland Public Library
• 4847 Hope Library
• 4849 Lincolnville Community Library
• 4856 Rockport Public Library
• 4858 South Thomaston Library
• 4862 Mildred Stevens Williams Memorial Library – Appleton
• 4915 Belfast Free Library
• 4916 Belfast Area High School
• 4917 Belgrade Public Library
• 4920 Upper Kennebec Valley Schools (RSU 13)
• 4924 Canaan Public Library
• 4928 Stewart Free Library – Corinna
• 4930 Abbott Memorial Library – Dexter
• 4934 Vassalboro Community School Library
• 4935 Vassalboro Public Library
• 4938 Farmington Public Library
• 4942 AOS 94 Dexter schools
• 4949 Liberty Library
• 4951 Monroe Community Library
• 4955 Jim Ditzler Memorial Library – New Sharon
• 4957 Norrridgewock Public Library
• 4958 Stewart Public Library – North Anson
• 4970 Rangeley Public Library
• 4974 Carver Memorial Library – Searsport
• 4976 Skowhegan Public Library
• 4988 MOFGA (Maine Organic Farmers and Gardeners Association) – Unity
• 4996 Phillips Public Library
• 5010 University of Maine Fort Kent
• 5014 Maine State Library (mstam)
• 5022 University of Maine
• 5031 Colby College
• 5081 Maine State Library
• 5052 Bowdoin College Library
• 5082 USM Lewiston (rsta)
• 5105 College of the Atlantic
• 5109 Bangor Public Library
• 5232 University of New England
• 5300 Kezar Falls Circulating Library
• 5301 Waterford Library
• 5302 New Vineyard Public Library
• 5303 South China
• 5304 Albert Church Brown
• 5305 Dr. Shaw Memorial Library
• 5306 Readfield Community Library
• 5307 Soldiers Memorial Library
• 5308 Acton Public
• 5309 Weld Public Library
• 5310 Underwood Memorial Library
• 5311 Brooksville Free Public Library
• 5312 Strong Public Library
• 5313 Jackman Public Library
• 5314 Millinocket Memorial Library
• 5555 Hartland Public Library
• 5891 Warren Memorial Library — Westbrook
• 6015 College of the Atlantic — Patron
• 6019 Maine College of Art
• 6184 Baxter Memorial Library — Gorham
• 6322 New England Bible College — South Portland
• 6397 Bailey Public Library — Winthrop
• 6420 Central Maine Community College
• 6440 Eastern Maine Community College
• 6450 Kennebec Valley Community College
• 6460 Northern Maine Community College
• 6470 Southern Maine Community College
• 6480 Washington County Community College
• 6490 York County Community College
• 6499 York County Community College — staff patrons
• 6561 New Portland Community Library
• 6662 Waterville Public Library
• 6978 Husson University — Bangor
• 7550 University of Maine (Orono)
• 7555 University of Maine (Orono)
• 7777 Bigelow Laboratory / DMR
• 7911 New Gloucester Public Library
• 8007 Walker Memorial Library — Westbrook
• 8181 Wells Public Library
• 8689 Unity College
• 8772 South Portland School System
• 8888 Topsham Public Library
• 8894 Unity Public Library
• 9001 Bangor High School
• 9012 Bangor High School
• 9090 Minerva High Demand Library
• 9236 Zadoc Long Free Library — Buckfield
• 9437 William Fogg Library — Eliot
• 9450 Mechanic Falls Public Library
• 9998 Maine InfoNet
• 9999 SOLAR