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Member Barcodes
Introduction
The Montana Shared Catalog uses Codabar 
barcodes. They are a 14 digit numeric barcode using Check Digit Calculation Option Mod 10. The digits are:
- Digit 1 indicates the type of barcode: 2 = patron, 3 = item
- Digits 2-5 (or 6*) identify the institution
- The next 8 (or 7*) digits identify the individual patron or item
- Digit 14 is the checksum
This is a list of the first 5 (or in some cases 6*) digits of the 14 digit barcode for each of the member libraries. Patron barcodes start with "2" and item barcodes start with "3".
* Both the BridgerNet Group and the Hi-Line libraries use 6 digits to identify their institutions. There are also some main library and branch groups (i.e. Mineral County) that use 6 digits.
| Library | Patron Barcode | Item Barcode |
| Aaniiih Nakoda College Library | 29905 | 39905 |
| Absarokee Elementary School Library | 29907 | 39907 |
| Absarokee High School Library | 29907 | 39907 |
| Alberton Branch Library | 298651 | 398651 |
| Alberton School Library | 29877 | 39877 |
| Ashland Public School | 29893 | 39893 |
| Belgrade Community Library | 237731 | 337731 |
| Bicentennial Library of Colstrip | 29530 | 39530 |
| Big Horn County Public Library | 20656 | 30656 |
| Big Sandy Branch Library | 298632 | 398632 |
| Big Sky Branch Library (Missoula Co.) | 23144 | 33144 |
| Big Timber Schools K-8 Library | 29536 | 39536 |
| Bigfork Branch Library | 23236 | 33236 |
| Bigfork High School Library | 29874 | 39874 |
| Bigfork K-8 Library | 29875 | 39875 |
| Billings Central Catholic High School Library | 29887 | 39887 |
| Billings Clinic Medical Library | 29871 | 39871 |
| Bitterroot Public Library | 29525 | 39525 |
| Blaine County Library | 298631 | 398631 |
| Bozeman Public Library | 237730 | 337730 |
| Bridger Public Library | 29554 | 39554 |
| Browning Branch Library | 23936 | 33936 |
| Carnegie Public Library | 29535 | 39535 |
| Clinton Elementary School | 29548 | 39548 |
| Columbia Falls Branch Library | 23236 | 33236 |
| Community Library at MSU | 21238 | 31238 |
| Culbertson Public Library | 29878 | 39878 |
| Darby Community Public Library | 29869 | 39869 |
| Darby Elementary School Library | 29908 | 39908 |
| Darby MS and HS Library | 29908 | 39908 |
| Dillon Public Library | 29512 | 39512 |
| Drummond School & Community Library | 23285 | 33285 |
| Ekalaka Public Library | 29899 | 39899 |
| Eureka Branch Library | 22613 | 32613 |
| Fallon County Library | 29896 | 39896 |
| Flathead County Library System | 23236 | 33236 |
| Flathead Valley Community College Library | 23656 | 33656 |
| Fort Shaw Elementary School Library | 29912 | 39912 |
| Frenchtown School and Community Library (Missoula Co.) | 29873 | 39873 |
| Froid Branch Library | 29879 | 39879 |
| Galata Elementary School | 298630 | 398630 |
| Glacier County Library | 23936 | 33936 |
| Glasgow City-County Library | 29889 | 39889 |
| Glendive Public Library | 23384 | 33384 |
| Harlem Public Library | 298633 | 398633 |
| Havre High School | 298634 | 398634 |
| Havre Middle School | 298635 | 398635 |
| Havre-Hill County Library | 298630 | 398630 |
| Hearst Free Library | 27455 | 37455 |
| Hellgate Elementary School K-2 | 23618 | 33618 |
| Hellgate Intermediate School 3-5 | 23618 | 33618 |
| Hellgate Middle School 6-8 | 23618 | 33618 |
| Henry A Malley Memorial Library | 29902 | 39902 |
| Highland Park Early Primary Schools | 298636 | 398636 |
| Highwood School Community Library | 29864 | 39864 |
| Jefferson County Library System | 29515 | 39515 |
| Joliet Public Library | 29895 | 39895 |
| Judson H. Flower Jr. Library | 29552 | 39552 |
| Kalispell Regional Medical Center Medical Library | 29527 | 39527 |
| Laurel Public Library | 29705 | 39705 |
| Lewistown Public Library | 29514 | 39514 |
| Libby Elementary School | 28802 | 38802 |
| Libby High School Library | 28802 | 38802 |
| Liberty County Library | 298637 | 398637 |
| Lima School District #12 | 29876 | 39876 |
| Lincoln County High School | 29892 | 39892 |
| Lincoln County Public Libraries | 22778 | 32778 |
| Lincoln-McKinley Primary School | 298638 | 398638 |
| Lolo School and Community Library | 24023 | 34023 |
| Madison Valley Public Library | 29539 | 39539 |
| Manhattan Community School Library | 298901 | 398901 |
| Manhattan Elementary School K-8 | 298902 | 398902 |
| Marion Branch Library | 23236 | 33236 |
| Meagher County/City Library | 29511 | 39511 |
| Miles City Public Library | 20872 | 30872 |
| Mineral County Public Library | 298650 | 398650 |
| Missoula International School | 29881 | 39881 |
| Missoula Public Library | 23144 | 33144 |
| Missoula Web on Wheels | 23144 | 33144 |
| Montana Academy | 29547 | 39547 |
| Montana Bible College Library | 29549 | 39549 |
| Montana Department of Transportation Library | 29526 | 39526 |
| Montana Historical Society Research Center | 29528 | 39528 |
| Montana Legislative Reference Center | 29551 | 39551 |
| Montana Office of Public Instruction Resource Center | 29917 | 39917 |
| Montana Public Service Commission Library | 2 | 3 |
| Montana State Genealogical Society Library | 29883 | 39883 |
| Montana State Library | 20864 | 30864 |
| North Jefferson County Library District | 29540 | 39540 |
| North Lake County Public Library | 29523 | 39523 |
| North Valley Public Library | 29517 | 39517 |
| Noxon School K-12 | 29910 | 39910 |
| Park High School Library | 29545 | 39545 |
| Parmly Billings Library | 21238 | 31238 |
| Parmly Billings Library Bookmobile | 21238 | 31238 |
| Parmly Billings Library Homebound | 21238 | 31238 |
| Petroleum County School-Community Library | 29906 | 39906 |
| Philipsburg Public Library | 29884 | 39884 |
| Pine Hills School Library | 29882 | 39882 |
| Plains Public Library District | 29522 | 39522 |
| Plains School Library K-12 | 29866 | 39866 |
| PLUK Library | 29870 | 39870 |
| Poplar City Library | 29880 | 39880 |
| Power Public School Library | 29532 | 39532 |
| Prairie County Library | 29897 | 39897 |
| Red Lodge Carnegie Library | 29891 | 39891 |
| Roosevelt County Library | 20604 | 30604 |
| Rosebud County Library | 20629 | 30629 |
| Roundup School-Community Library | 29886 | 39886 |
| Seeley Lake Branch Library (Missoula Co.) | 23144 | 33144 |
| Sheridan County Library | 29904 | 39904 |
| Sheridan Public Library | 29867 | 39867 |
| Sidney-Richland County Library | 29888 | 39888 |
| Simms High School Library | 29912 | 39912 |
| St Francis Intermediate School Library | 29887 | 39887 |
| St Francis Primary School Library | 29887 | 39887 |
| St Francis Upper School Library | 29887 | 39887 |
| St Ignatius School-Community Library | 29524 | 39524 |
| State Government Information Center | 20864 | 30864 |
| State Law Library of Montana | 20000 | 30000 |
| Stillwater County Library | 29916 | 39916 |
| Stone Child College Library | 29894 | 39894 |
| Summit Preparatory School | 29911 | 39911 |
| Sunnyside Intermediate School Library | 298639 | 398639 |
| Swan Valley Community Library (Missoula Co.) | 23144 | 33144 |
| Sweet Grass County High School Library | 29536 | 39536 |
| Thompson Falls Elementary School Library | 29546 | 39546 |
| Thompson Falls High School | 29546 | 39546 |
| Thompson Falls Junior High School Library | 29546 | 39546 |
| Thompson Falls Public Library | 29521 | 39521 |
| Thompson-Hickman County Library | 29550 | 39550 |
| Three Forks Community Library | 237733 | 337733 |
| Troy Branch Library | 24040 | 34040 |
| Twin Bridges Public Library | 29542 | 39542 |
| West Yellowstone Public Library | 237732 | 337732 |
| West Yellowstone Schools Library | 29885 | 39885 |
| Whitefish Community Library | 29914 | 39914 |
| Whitehall Community Library | 29516 | 39516 |
| Whitehall K-12 Library | 29529 | 39529 |
