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Area Code 920
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 920 (eastern Wisconsin).

Click on the pictures below for a larger version.


Abrams

Photo 2 | Photo 3

Listing Updated:
August 2011

Operating Company:
Nsight / Bayland Telephone

CLLI:
ABRMWIXADS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 826

Notes:
HQ for Nsight Teleservices and their CellCom cellular division. I'm not sure which building houses the DMS-10 switch. Photo 2 shows the back of the main building, while Photo 3 shows the garage next to the main building.

 

Beaver Dam / Burnett

Photo 2

Listing Updated:
March 2009

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
BVDMWI01DSA

Switch Type:
Alcatel/Lucent 5ESS Host

Prefixes Served:
(920) 356, 689 (Burnett), 885, 887

Notes:
Was originally a #1 Step by Step, now a Lucent 5ESS. Photo 2 shows a microwave dish pointed to the microwave relay station in Slinger, WI.
Source: Joe in WI.

 

Berlin

Listing Updated:
August 2014

Operating Company:
CenturyLink/CenturyTel

CLLI:
BRLNWI01DS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 361

Notes:
Source: Joe in WI.

 

Brandon

Listing Updated:
May 2014

Operating Company:
CenturyLink/CenturyTel/Fairwater-Brandon-Alto Telephone Co.

CLLI:
BRNDWIXBRS0

Switch Type:
Remote Switch (unknown type)

Prefixes Served:
(920) 346

Notes:
Originally had an Automatic Electric Step by Step switch. Source: Joe in WI.

 

Campbellsport

Listing Updated:
September 2007

Operating Company:
Verizon/GTE

CLLI:
CMPTWIXARS0

Switch Type:
Automatic Electric GTD-5 RSU

Prefixes Served:
(920) 533

Notes:
Was an AE SXS until 1982, then  ITS-5 Host until 2005, now an AE remote off GTD-5 in Oak Field, WI. Was one of the first switches in GTE to be digital.
Source: Joe in WI.

 

Clyman

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
CLYMWIXARL0

Switch Type:
Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 696

Notes:
Source: Joe in WI.

 

Fond Du Lac

Listing Updated:
June 2016

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
FDULWI01DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(920) 266, 906-7, 921-4, 926, 929

Notes:
Source: Joe in WI.

 

Fox Lake

Photo 2

Listing Updated:
June 2011 / March 2009

Operating Company:
CenturyLink/CenturyTel/People's Telephone

CLLI:
FXLKWIXARS0

Switch Type:
Alcatel/Lucent 5ESS remote

Prefixes Served:
(920) 928

Notes:
Before 1995 was People's Telephone Co. Was A DMS-10 Now is a AT&T 5ESS-2000. Photo 2 is the original photo taken in March 2009. Source: Joe in WI.

 

Green Bay

"Cardinal"

Listing Updated:
August 2011

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
GNBYWI13DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(920) 434, 661-2

Notes:
Serves western parts of Green Bay ratecenter.

 

Green Bay

"Jefferson"

Listing Updated:
January 2017

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
GNBYWI01DS1
GNBYWI01DSA

Switch Type:
DS1: Genband/Nortel DMS-100
DSA: Alcatel/Lucent 5ESS

Prefixes Served:
DS1: (920) 430-3, 435-8, 444-5, 455
DSA: (920) 448

Notes:
 

 

Green Bay

"Ridge"

Listing Updated:
August 2011

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
GNBYWI11DS0
GNBYWI11DSA
GNBYWI11RS0

Switch Type:
DS0 & DSA: Genband/Nortel DMS-100
RS0: Alcatel/Lucent 5ESS Remote

Prefixes Served:
DS0: (920) 327
DSA: (920) 405, 429, 490-1, 494, 496-9, 592
RS0: (920) 492

Notes:
Serves northwestern parts of Green Bay ratecenter.

 

Horicon

Listing Updated:
August 2014

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
HRCNWI11RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 485

Notes:
Source: Joe in WI.

 

Hustisford

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
HSFDWIXARS0

Switch Type:
Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 349

Notes:
Source: Joe in WI.

 

Larsen

Listing Updated:
June 2016

Operating Company:
CenturyLink/CenturyTel/Larsen-Readfield Telephone Co

CLLI:
LRSNWIXADSA

Switch Type:
Nokia Networks DCO

Prefixes Served:
(920) 836

Notes:
Source: Joe in WI.

 

Lebanon

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
LBNNWIXARL0

Switch Type:
Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 925

Notes:
Source: Joe in WI.

 

Lena

Listing Updated:
August 2011

Operating Company:
CenturyLink/CenturyTel

CLLI:
LENAWIXARS0

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(920) 829

Notes:
 

 

Lomira

Listing Updated:
August 2014

Operating Company:
Frontier/Verizon/GTE

CLLI:
LOMRWIXARS6

Switch Type:
Remote Switch (unknown type)

Prefixes Served:
(920) 269

Notes:
One of the first Vidar remote digital offices. It was a remote off of a Vidar switch in Campbelsport, WI circa 1978. It had replaced an outgrown Automatic Electric Step by Step switch. Though the exact switch is not known, it now appears to be an AE GTD-5 remote hosted in Oakfield. Source: Joe in WI.

 

Mapleton

Listing Updated:
May 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
MPTNWIXARS0

Switch Type:
Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 355, 474

Notes:
Manual until 1957, then a Leich all-relay switch was installed. Current building built in 1969 for an  Automatic Electric step by step. In 1991, current switch installed. Source: Joe in WI.

 

Mayville

Listing Updated:
July 2015

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
MYVLWI11RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 387

Notes:
Source: Joe in WI.

 

Neenah

Listing Updated:
June 2016

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
NENHWI11DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(920) 215, 720-2, 725, 727, 729, 751, 969

Notes:
Source: Joe in WI.

 

Neosho

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
NESHWIXARS0

Switch Type:
Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 368, 625

Notes:
Source: Joe in WI.

 

Oconto

Listing Updated:
August 2011

Operating Company:
CenturyLink/CenturyTel/Ameritech/Wisconsin Telephone

CLLI:
OCNTWI11RS1

Switch Type:
Alcatel/Lucent 5ESS Remote (EXM)

Prefixes Served:
(920) 834

Notes:
Oconto is part of a group of ratecenters that were sold to CenturyTel from Ameritech several years ago.

 

Oconto Falls

Listing Updated:
August 2011

Operating Company:
CenturyLink/CenturyTel/Ameritech/Wisconsin Telephone

CLLI:
OCFLWI11RS1

Switch Type:
Alcatel/Lucent 5ESS Remote (EXM)

Prefixes Served:
(920) 846

Notes:
Oconto Falls is part of a group of ratecenters that were sold to CenturyTel from Ameritech several years ago.

 

Omro

Listing Updated:
June 2016

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
OMROWI11DS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 685

Notes:
Source: Joe in WI.

 

Oshkosh

Listing Updated:
June 2016

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
OSHKWI01DSA

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(920) 223, 231-3, 235-7, 303, 424, 426, 527

Notes:
Source: Joe in WI.

 

Princeton

Listing Updated:
September 2012

Operating Company:
CenturyLink/CenturyTel

CLLI:
PRTNWI11DS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 295

Notes:
 

 

Randolph

Photo 2

Listing Updated:
March 2009

Operating Company:
CenturyLink/CenturyTel/People's Telephone

CLLI:
RNDHWIXBDS1

Switch Type:
Alcatel/Lucent 5ESS Host (VCD)

Prefixes Served:
(920) 326

Notes:
Before 1995 was People's Telephone Company.  Was A DMS-10 now a AT&T 5ESS-2000. Photo 2 is the old CO building before the new one was built. Source: Joe in WI.

 

Redgranite

Listing Updated:
August 2014

Operating Company:
CenturyLink/CenturyTel

CLLI:
RDGRWI11DS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 566

Notes:
Source: Joe in WI.

 

Ripon

Listing Updated:
May 2014

Operating Company:
CenturyLink/CenturyTel/PTI/Northwest Telephone

CLLI:
RIPNWIXADS2

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(920) 745, 748

Notes:
Originally a Stromberg-Carlson XY switch. Source: Joe in WI.

 

Theresa

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
THRSWIXARS4

Switch Type:
Remote Switch (unknown type)

Prefixes Served:
(920) 276, 488

Notes:
Source: Joe in WI.

 

Watertown

Photo 2

Listing Updated:
May 2014

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
WTTWWI01DSA

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(920) 206, 261-2

Notes:
Originally had a #5 Crossbar switch. Source: Joe in WI.

 

Waupun

Listing Updated:
May 2014

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
WAPNWI11RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 324

Notes:
Originally had a CDO step by step switch. Source: Joe in WI.

 

Wautoma

Listing Updated:
August 2014

Operating Company:
CenturyLink/CenturyTel

CLLI:
WTMAWIXADS0

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(920) 787

Notes:
Source: Joe in WI.

 

Weyauwega

Listing Updated:
June 2011

Operating Company:
CenturyLink/CenturyTel

CLLI:
WYWGWIXADS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 867

Notes:
Source: Joe in WI.

 

Winneconne

Listing Updated:
June 2016

Operating Company:
at&t/SBC/Ameritech/Wisconsin Telephone

CLLI:
WNCNWI11DS0

Switch Type:
Genband/Nortel DMS-10

Prefixes Served:
(920) 582

Notes:
Source: Joe in WI.

 

 


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Page last modified January 30, 2017
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