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Area Code 517
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 517 (South Central Michigan).

Click on the pictures below for a larger version.


Adrian
 

Listing Updated:
May 2023

Operating Company:
Frontier/Verizon/GTE

CLLI:
ADRNMIXGDS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(517) 263-6

Notes:
Source: GSV

 

Bath
 

Listing Updated:
October 2023

Operating Company:
Frontier/Verizon/GTE/Contel

CLLI:
BATHMIXGRS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(517) 641

Notes:
Source: Austin B.

 

Charlotte
 

Listing Updated:
May 2023

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
CHRLMIMNDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(517) 541, 543

Notes:
Source: GSV

 

Clayton
 

Listing Updated:
July 2014

Operating Company:
TDS/Communications Corp. of Michigan

CLLI:
CYTNMIXIPS0

Switch Type:
Packet End Office (unknown type)

Prefixes Served:
(517) 545

Notes:
Source: GSV

 

Coldwater
 

Listing Updated:
September 2024

Operating Company:
Frontier/Verizon/GTE

CLLI:
CDWRMIXGDS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(517) 278-9

Notes:
Source: GSV

 

De Witt
 

Listing Updated:
September 2022

Operating Company:
Frontier/Verizon/GTE

CLLI:
DWTTMIXGDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(517) 239, 668-9

Notes:
Source: GSV

 

Grand Ledge
 

Listing Updated:
August 2014

Operating Company:
Frontier/Verizon/GTE

CLLI:
GRLDMIXGDS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(517) 622, 627

Notes:
Source: GSV

 

Hillsdale
 

Listing Updated:
September 2024

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
HLDLMIMNRSA

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(517) 437, 439, 607

Notes:
Source: GSV

 

Holt
 

Listing Updated:
November 2023

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
HOLTMIHEDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(517) 694, 699

Notes:
Source: GSV

 

Howell
 

Listing Updated:
August 2021

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
HOWLMIMNDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(517) 540, 545-6, 548, 552

Notes:
Source: GSV

 

Jackson

"Main"
 

Listing Updated:
August 2024

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
JCSNMIMNDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(517) 205, 768, 780, 782-4, 787-9, 796, 817, 840-1

Notes:
Source: GSV

 

Jackson

"Michigan Center"
 

Listing Updated:
August 2019

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
MCHCMIMNRSA

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(517) 764

Notes:
Source: GSV

 

Jackson

"Spring Arbor"
 

Listing Updated:
October 2023

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
JCSNMISARSA

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(517) 750

Notes:
Source: GSV

 

Lansing

"Main"
 

Listing Updated:
August 2019

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
LNNGMIMNDS0
LNNGMIMNDS1

Switch Type:
DS0: Ribbon/Genband/Nortel DMS-100/200
DS1: Ribbon/Genband/Nortel DMS-100

Prefixes Served:
DS0: (517) 316, 325, 334, 346, 367, 371-2, 763

DS1: (517) 241, 253, 267, 284, 335, 342, 364, 373-4, 377, 481-5, 487, 702, 802, 885

Notes:
Source: GSV

 

Lansing

"East Lansing"
 

Listing Updated:
August 2019

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
ELNSMIMNDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(517) 203, 324, 332-3, 336-7, 351, 353, 355, 432, 664, 884

Notes:
Source: GSV

 

Lansing

"Haslett"

Photo 2 | Photo 3 | Photo 4 | Photo 5
 

Listing Updated:
October 2023

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
HSLTMIHSRSA

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(517) 339, 575

Notes:
Source: Austin B.

 

Lansing

"Northwest"
 

Listing Updated:
October 2023

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
LNNGMINWDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(517) 321, 323, 327, 703, 886

Notes:
Source: GSV

 

Lansing

"Okemos"

Photo 2 | Photo 3 | Photo 4
 

Listing Updated:
October 2023

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
OKMSMIMNDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(517) 347, 349, 381, 706

Notes:
Source: Austin B.

 

Mason
 

Listing Updated:
September 2019

Operating Company:
at&t/SBC/Ameritech/Michigan Bell

CLLI:
MASNMIMSRSA

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(517) 244, 676

Notes:
Source: GSV

 

Perry
 

Listing Updated:
August 2022

Operating Company:
TDS/Shiawassee Telephone Company

CLLI:
PRRYMIXIPS0

Switch Type:
Packet End Office (unknown type)

Prefixes Served:
(517) 625

Notes:
Source: GSV

 

Sand Creek
 

Listing Updated:
May 2023

Operating Company:
Sand Creek Telephone Company

CLLI:
SNCKMIXIDS0

Switch Type:
Copercom CSX 2100 Media Gateway

Prefixes Served:
(517) 436

Notes:
Source: GSV

 

Springport
 

Listing Updated:
August 2024

Operating Company:
Springport Communications

CLLI:
SPPTMIXIDS0

Switch Type:
Nokia/Siemens/Stromberg-Carlson DCO

Prefixes Served:
(517) 857

Notes:
Source: GSV

 

Sunfield
 

Listing Updated:
June 2024

Operating Company:
Brightspeed/CenturyLink/CenturyTel

CLLI:
SNFDMIXIDS0

Switch Type:
Nokia/Siemens/Stromberg-Carlson DCO

Prefixes Served:
(517) 566

Notes:
Source: GSV

 

Tecumseh
 

Listing Updated:
June 2024

Operating Company:
Frontier/Verizon/GTE

CLLI:
TCMSMIXGDS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(517) 423-4, 815

Notes:
Source: GSV

 

Waldron
 

Listing Updated:
July 2024

Operating Company:
Waldron Telephone Company

CLLI:
WDRNMIXJDS1

Switch Type:
Copercom CSX 2100 Media Gateway

Prefixes Served:
(517) 286

Notes:
Source: GSV

 

Webberville
 

Listing Updated:
September 2023

Operating Company:
Frontier/Verizon/GTE/Contel

CLLI:
WBVLMIXJDS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(517) 521

Notes:
Source: GSV

 

Williamston
 

Listing Updated:
September 2019

Operating Company:
Frontier/Verizon/GTE

CLLI:
WMTNMIXGDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(517) 655

Notes:
Source: GSV

 

Visit other Michigan Area Codes: 231 248 269 313 517 586 616 734 810 906 989

Visit nearby regions: Indiana Ohio Ontario Wisconsin 


Copyright 2025 Telephone Central Office Building Pictures
Page last modified April 16, 2025
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