EXHIBIT A Creditor Matrix Service List CreditorName CreditorNoticeName Address1 Address2 Address3 Address4 City State Zip Country 10K GOLD PROMOTIONS PO Box 1296 FAIR OAKS CA 95628 10K WIZARD TECHNOLOGY LLC 1950 STEMMONS Ste 7016 DALLAS TX 75207 1ST DAKOTA NATIONAL BANK 225 CEDAR ST YANKTON SD 57078-4333 2002 MEA MFT EXHIBITS 1232 EE 6TH Ave HELENA MT 59601 2003 MEA MFT EXHIBITS PO Box 147 GLENDIVE MT 59330 281 TRAVEL CENTER 601 COMMERCIAL AVE SW WOLSEY SD 57384 2M COMPANY 1215 CORDOVA ST BILLINGS MT 59101-6389 3 C ELECTRIC 310 E Railroad CUT BANK MT 59427 3 RIVERS COMMUNICATIONS PO Box 429 FAIRFIELD MT 59436-0429 3 Rivers Wireless PO Box 819 Fairfield MT 59436 3C Electric 310 E Railway Cut Bank MT 59427 3E COMPANY 1905 ASTON AVE STE 100 CARLSBAD CA 92008 3M PO Box 1450 MINNEAPOLIS MN 55485-9045 3MAERDEEN ATTN PAUL MICKA 2500 HUDSON RD BUILDING 2241N04 ST PAUL MN 55144 3MBROOKINGS ATTN DAREL PALM BOX 5227 BROOKINGS SD 57006-5227 3MBROOKINGS ATTN PAUL MICKA 2500 HUDSON RD BUILDING 2241N04 ST PAUL MN 55144 4 BS RESTAURANT 3495 W Broadway MISSOULA MT 59802 4 RIVERS CONCRETE PO Box 168 SHERIDAN MT 59749 4 SEASONS PLUMBING & HEATING 110 N CROW AVE HARDIN MT 59034 4G ELECTRIC PO Box 3538 MISSOULA MT 59801 4G PLUMBING & HEATING INC 1515 WYOMING MISSOULA MT 59801 5 STAR AUTO CRAFTERS 800 DAKOTA N HURON SD 57350 A & A ASPHALT MAINTENANCE 2326 W CENTRAL MISSOULA MT 59801 A & A IMPLEMENT INC 102 2ND St E ROUNDUP MT 59072-2910 A & A PARTS SUPPLY & SERVICE PO Box 301 AUGUSTA MT 59410 A & B BUSINESS EQUIPMENT INC 2904 W RUSSELL ST SIOUX FALLS SD 57107 A & D CAMPERS INC 515 32ND AVE BROOKINGS SD 57006 A & M FIRE & SAFETY INC 739 UTAH BUTTE MT 59702 A & M FIRE & SAFETY INC 739 UTAH PO Box 4425 BUTTE MT 59702 A & O ELECTRIC LLC PO Box 4485 HELENA MT 59604 A & R EXTERIORS INC 19 CHINOOK TRAIL BOZEMAN MT 59718 A & S HARDWARE HANK 516 MAIN WEBSTER SD 57274 A & S METALS 2100 MEADOWLARK BUTTE MT 59701 A & T FIBERGLASS REPAIR OF 1014 VALLEYVIEW DR GREAT FALLS MT 59404 A & W OFFICE SERVICE 100 N 27TH ST BILLINGS MT 59101 A 1 AUTO AND TRUCK COLLISION REPAIR 2141 OLD HWY 14 W HURON SD 57350 A 1 GAS & GO 220 W HWY 50 AVON SD 57315 A 1 JANITORIAL PO Box 1093 MITCHELL SD 57301 A 1 LANDSCAPING 1730 S 48TH ST W BILLINGS MT 59106-3770 A 1 LOCKSMITHING 512 S MAIN ST ABERDEEN SD 57401 A 1 REFINISHING 4154 MITCHELL BILLINGS MT 59101 A 1 RENTALS 1400 CEDAR ST HELENA MT 59601 A 1 RENTALS 2001 GRAND Ave BILLINGS MT 59102 A 1 SANITATION PO Box 5371 KALISPELL MT 59903 A 1 TOWING 2905 N MONTANA AVE HELENA MT 59601 A B C D GIRLS SOFTBALL 312 W 17TH GRAND ISLAND NE 68801 A CORE OF IDAHO INC PO Box 2559 IDAHO FALLS ID 83403-2461 A Core of Idaho LLC dba A Core of Missoula Inc PO Box 2559 Idaho Falls ID 83403-2559 A CORE OF MONTANA INC DBA: ACORE OF MISSOULA IDAHO FALLS ID 83403-2559 A FEW MORE BOOKS 520 N 32ND BILLINGS MT 59101 A G A DISTRIBUTION CENTER 610 WINTERS Ave PARAMUS NJ 07652 A I CREDIT CORP PO Box 73095 CHICAGO IL 60673-7095 A OX WELDING SUPPLY CO INC PO Box 86667 SIOUX FALLS SD 57118-6667 A PLUS PRINTER SERVICE & SUPPLIES 604 W Cascade St SIOUX FALLS SD 57108-3121 A TECH 2936 4TH ST NE WATERTOWN SD 57201 A TO Z LOCK & KEY 1900 4TH St NE GREAT FALLS MT 59409 A TO Z MECHANICAL 501 40TH ST SW FARGO ND 58103 A TO Z SEW & VAC 266 DAKOTA S HURON SD 57350 A&M Fire and Safety Inc 739 Utah Butte MT 59701 A&M MARKET PO Box 454 KIMBALL SD 57355 A&M TOWING 415 1ST AVE SE ABERDEEN SD 57401 A&S Metals PO Box 3772 Butte MT 59701-6800 A/R BLUMBERG EXCELSIOR 62 WHITE ST NEW YORK NY 10013 A1 Janitorial 412 N Foster Mitchell SD 57301 AAA FENCING & WELDING INC 1008 US HIGHWAY 93 N VICTOR MT 59875 AAA SELF SERV STORAGE PO Box 212 HELENA MT 59624 AAIM MANAGEMENT ASSOCIATION 3700 S LINDBERGH BLVD ST LOUIS MO 63127 AAIM MANAGEMENT ASSOCIATION 3700 SOUTH LINDBERGH BLVD ST LOUIS MO 63127 AARON PRUITT 722 S GRAND AVE BOZEMAN MT 59715 ABB 3201 S LAKEPORT SIOUX CITY IA 51106 ABB AUTOMATION INC PO Box 730293 DALLAS TX 75373-4888 ABB INC 35 N SNOWDRIFT RD ALLENTOWN PA 18106 ABB INC 7921 SOUTHPARK PLAZA Ste 210 LITTLETON CO 80120 ABB INC 9000 Regency Parkway Ste 300 Cary NC 27511 ABB INC 9000 Regency Parkway Ste 300 Cary NC 27511 ABB INC PO Box 687 PINETOPS NC 27864 ABB INC ROUTE 1 HWY 412 ALAMO TN 38001 ABB INC C/O WINN MARION 710 GRAND AVE No12 BILLINGS MT 59101 ABB POWER T & D COMPANY PO Box 70088 CHICAGO IL 60673-0088 ABB POWER T & D COMPANY INC 475 E 500 S Ste 250 SALT LAKE CITY UT 84111 ABBOTT HOUSE PO Box 700 MITCHELL SD 57301 ABBY KROUPA KIMBALL HIGH SCHOOL KIMBALL SD 57355 In re: NorthWestern Corporation 12/13/2007 12:39 PM Case No. 03-12872 (KJC) Page 1 of 154 00047427.XLS Creditor Matrix Service List CreditorName CreditorNoticeName Address1 Address2 Address3 Address4 City State Zip Country ABC RENTAL & EQUIPMENT SALES 1624 W BEALL St BOZEMAN MT 59715 ABC RENTAL & EQUIPMENT SALES 3750 GRANT CREEK RD MISSOULA MT 59808 Aberdeen American News 124 S 2nd St Aberdeen SD 57401 Aberdeen American News Po Box 4430 Aberdeen SD ABERDEEN AREA BOYS & GIRLS 1111 E 1ST AVE ABERDEEN SD 57401 ABERDEEN ASPHALT INC PO Box 1007 ABERDEEN SD 57402 ABERDEEN BUILDERS EXCHANGE 422 5TH AVE SE STE 106 ABERDEEN SD 57401 Aberdeen Catholic Schoo 1400 N Dakota St Aberdeen SD 57401-4414 Aberdeen Catholic Schoo 505 SE 3rd Ave Aberdeen SD ABERDEEN CATHOLIC SCHOOL SYSTEM 1400 N DAKOTA ST ABERDEEN SD 57401 ABERDEEN CATHOLIC SCHOOL SYSTEM HIGH SCHOOL 1400 N DAKOTA ST ABERDEEN SD 57401 ABERDEEN CENTRAL BOOSTER PO Box 459 ABERDEEN SD 57401 ABERDEEN CHAMBER OF COMMERCE 516 S MAIN ST ABERDEEN SD 57402-1179 Aberdeen Chrysler Center Attn Mike Mikula 901 Auto Plaza Dr Aberdeen SD 57401 ABERDEEN CLEAN ALL 908 NINTH AVE NE ABERDEEN SD 57401 ABERDEEN DEVELOPMENT CORPORATION 416 PRODUCTION St N ABERDEEN SD 57401 Aberdeen Development Corporation 715 n Brown County 19 Aberdeen SD 57402-1179 Aberdeen Development Corporation Attn Jim Barringer Banner Shedahl Building PO Box 1179 Aberdeen SD 57402-1179 ABERDEEN EQUIPMENT COMPANY 5055 E HIGHWAY 12 ABERDEEN SD 57401 ABERDEEN FAMILY PHYSICANS 815 1ST AVE SE STE 104 ABERDEEN SD 57401 ABERDEEN FAMILY YMCA 420 S LINCOLN ABERDEEN SD 57401 ABERDEEN FEDERAL CREDIT UNION PO Box 1495 ABERDEEN SD 57402-1495 ABERDEEN FRATERNAL PO Box 1176 ABERDEEN SD 57402-1176 ABERDEEN GLASS & MIRROR 700 S MAIN ST ABERDEEN SD 57401 ABERDEEN HOCKEY ASSOCIATION 12944 IRONWOOD DR ABERDEEN SD 57401 ABERDEEN HOUSING 2324 3RD AVE SE ABERDEEN SD 57401 Aberdeen Housing Authority 2222 3rd Ave SE Aberdeen SD 57401 Aberdeen Housing Authority Homestead Attn Mrs Juletta M Smith 2222 3rd Ave SE Aberdeen SD 57401 Aberdeen Living Center 1700 N Hwy 281 Aberdeen SD 57401 ABERDEEN LOCK & KEY 14 1/2 3RD AVE SW ABERDEEN SD 57401 Aberdeen Motors Inc 901 Auto Plaza Dr Aberdeen SD 57401 ABERDEEN OPTIMIST CLUB PO Box 583 ABERDEEN SD 57402-0583 aberdeen parks & rec 123 s linclon st aberdeen SD 57401 ABERDEEN PARKS REC & FORESTRY 612 SE 10TH AVE ABERDEEN SD 57401-7740 ABERDEEN PLUMBING AND HEATING SVCS PO Box 729 ABERDEEN SD 57402-0729 ABERDEEN PUBLIC SCHOOL District Service Center 314 S MAIN ST ABERDEEN SD 57401-4146 Aberdeen Public Schools Attn Scott Sikkink Director of Buildings and Grounds 225 SE 3rd Ave Aberdeen SD 57401 ABERDEEN SANDBLASTING & 603 9TH AVE SW ABERDEEN SD 57401 Aberdeen School District May Overby Schoo Attn Business Manger Po Box 4203 Aberdeen SD 57402-4203 Aberdeen School District 61 Attn Dan Hoke Superintenden Henry Neill Elementry 225 Third Ave SE Aberdeen SD 57401 Aberdeen School District 61 c o Business Manager 203 3rd Ave SE Aberdeen SD 57401 Aberdeen School District 61 for Holgate Jr High c o Business Manager 203 3rd Ave SE Aberdeen SD 57401 Aberdeen School District 61 Henry Neill Elementry 1215 6th Ave SE Aberdeen SD 57401 Aberdeen School District 61 Howard Hedger School PO Box 4203 Aberdeen SD 57402 4203 Aberdeen School District 61 Simmona Jr High School Attn Business Manger 203 3rd Ave SE Aberdeen SD 57402-4203 ABERDEEN TV & APPLIANCE INC 20 6TH AVE SE ABERDEEN SD 57401 ABF FREIGHT SYSTEMS 4300 STATE Ave BILLINGS MT 59101 ABLE 2 PRODUCTS COMPANY PO Box 543 CASSVILLE MO 65625-0543 ABLE AUTO GLASS 1801 W BURNSIDE SIOUX FALLS SD 57104 ABN AMRO BANK 208 S LASALLE Ste 1500 CHICAGO IL 60604 ABSAROKEE HIGH SCHOOL 327 SOURTH WOODARD ABSAROKEE MT 59001 ABSAROKEE RECREATIONAL ASSOCIATION PO Box 846 ABSAROKEE MT 59001 AC MUSIC BOOSTERS PO Box 106 PICKSTOWN SD 57367-0106 ACCIDENT RECORDS 700 E Broadway PIERRE SD 57501 ACCOM INC PO Box 2980 GRASS VALLEY CA 95945 ACCOUNTS MANAGEMENT CORP OF MT PO Box 3107 GREAT FALLS MT 59403-3107 ACCOUNTS MANAGEMENT INC 5132 S CLIFF AVE 1 SIOUX FALLS SD 57108-5437 ACCOUNTS MANAGEMENT INC PO Box 1843 SIOUX FALLS SD 57101 ACCURATE CALIBRATION SERVICES 32 ELYCRODT AVE ROCKAWAY NJ 07866 ACCURINT 6601 PARK OF COMMERCE BLVD BOCA RATON FL 33487 Accurint Michael Saraceno 6601 Park of Commerce Boca Raton FL 33487 ACCUTITLE INC 1216 16TH ST W Ste 16 BILLINGS MT 59102-4198 Ace Electric Inc 808 W Main Laurel MT 59044 ACE ELECTRIC INC PO Box 520 LAUREL MT 59044-0520 ACE HARDWARE 307 W 58TH ST KEARNEY NE 68845 ACE KELLY HALL PLMB & HTG PO Box 1808 BOZEMAN MT 59715-1808 ACE REFRIGERATION 1343 RIVER St MISSOULA MT 59801 ACE SOLVENT SYSTEMS INC PO Box 8722 KALISPELL MT 59903 ACE USA DEPT CH 10123 PALATINE IL 60055-0123 ACEUSA ACE Bond Services Insurance Compay of North America et al DEPT CH 10123 PALATINE IL 60055-0123 ACHIEVEGLOBAL PO Box 75708 CHARLOTTE NC 28275 ACME CHEMICAL TOILET c o Brian & Lana O Myer 51 Sunrise Dr Kalispell MT 59901 ACOMA LOUNGE INC 60 E BROADWAY BUTTE MT 59701 ACSIS INC 3000 LINCOLN Dr E MARLTON NJ 08053 ACT PO Box 1181 MITCHELL SD 57301 ACT TELECONFERENCING SERVICES INC DEPT 1033 DENVER CO 80291-1033 ACTARIS US GAS 970 HWY 127 N OWENTON KY 40359 ACTERNA 12410 MILESTONE CENTER Dr GERMANTOWN MD 20876-7100 ACTION AIR 5776 LINCOLN RD W HELENA MT 59602 ACTION AUTO GLASS OF MISSOULA 2825 STOCKYARD Rd No1 MISSOULA MT 59808 In re: NorthWestern Corporation 12/13/2007 12:39 PM Case No.