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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:
(was ABRMWIXADS0)

Switch Type:
Ribbon/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.

 

Algoma

Listing Updated:
August 2020

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

CLLI:
ALGMWI11RS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 365, 487

Notes:
Source: E. Stadick

 

Baileys Harbor

Listing Updated:
August 2020

Operating Company:
Frontier/Verizon/GTE

CLLI:
BLHRWIXARS0

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

Prefixes Served:
(920) 839

Notes:
Source: E. Stadick

 

Beaver Dam / Burnett

Photo 2

Listing Updated:
March 2009

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

CLLI:
BVDMWI01DSA

Switch Type:
Nokia/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 M..

 

Berlin

Listing Updated:
August 2014

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
BRLNWI01DS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(920) 361

Notes:
Source: Joe M..

 

Brandon

Listing Updated:
May 2014

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

CLLI:
BRNDWIXBRS0

Switch Type:
Remote Switch (unknown type)

Prefixes Served:
(920) 346

Notes:
Originally had an Nokia/Lucent/Automatic Electric Step by Step switch. Source: Joe M..

 

Campbellsport

Listing Updated:
September 2007

Operating Company:
Frontier/VerizonGTE

CLLI:
CMPTWIXARS0

Switch Type:
Nokia/Lucent/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 M..

 

Cedar Grove

Listing Updated:
September 2020

Operating Company:
Frontier/Verizon/GTE

CLLI:
CDGVWIXARS0

Switch Type:
Nokia/Lucent/Automatic Electric GTD-5 RSU

Prefixes Served:
(920) 668

Notes:
Source: E. Stadick

 

Clyman

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
CLYMWIXARL0

Switch Type:
Nokia/Lucent/Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 696

Notes:
Source: Joe M..

 

Fond Du Lac

Listing Updated:
June 2016

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

CLLI:
FDULWI01DS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

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

Notes:
Source: Joe M..

 

Forestville

Listing Updated:
August 2020

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
FSVLWIXADS0

Switch Type:
Digital Switch (unknown type)

Prefixes Served:
(920) 856

Notes:
Source: E. Stadick

 

Fox Lake

Photo 2

Listing Updated:
June 2011 / March 2009

Operating Company:
Brightspeed/Centurylink/CenturyTel/People's Telephone

CLLI:
FXLKWIXARS0

Switch Type:
Nokia/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 M..

 

Green Bay

"Cardinal"

Listing Updated:
August 2011

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

CLLI:
GNBYWI13DS0

Switch Type:
Ribbon/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: Ribbon/Genband/Nortel DMS-100
DSA: Nokia/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: Ribbon/Genband/Nortel DMS-100
RS0: Nokia/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.

 

Green Lake

Listing Updated:
September 2021

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

CLLI:
GNLKWI11DS1

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(920) 294

Notes:
Source: E. Stadick

 

Horicon

Listing Updated:
August 2014

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

CLLI:
HRCNWI11RS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 485

Notes:
Source: Joe M..

 

Hustisford

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
HSFDWIXARS0

Switch Type:
Nokia/Lucent/Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 349

Notes:
Source: Joe M..

 

Kewaunee

Listing Updated:
August 2020

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

CLLI:
KEWNWI11RS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 388

Notes:
Source: E. Stadick

 

Larsen

Listing Updated:
June 2016

Operating Company:
Brightspeed/Centurylink/CenturyTel/Larsen-Readfield Telephone Co

CLLI:
LRSNWIXADSA

Switch Type:
Nokia Networks DCO

Prefixes Served:
(920) 836

Notes:
Source: Joe M..

 

Lebanon

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
LBNNWIXARL0

Switch Type:
Nokia/Lucent/Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 925

Notes:
Source: Joe M..

 

Lena

Listing Updated:
August 2011

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
LENAWIXARS0

Switch Type:
Ribbon/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 Nokia/Lucent/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 M..

 

Mapleton

Listing Updated:
May 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
MPTNWIXARS0

Switch Type:
Nokia/Lucent/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  Nokia/Lucent/Automatic Electric step by step. In 1991, current switch installed. Source: Joe M..

 

Mayville

Listing Updated:
July 2015

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

CLLI:
MYVLWI11RS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 387

Notes:
Source: Joe M..

 

Neenah

Listing Updated:
June 2016

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

CLLI:
NENHWI11DS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

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

Notes:
Source: Joe M..

 

Neosho

Listing Updated:
July 2015

Operating Company:
Frontier/Verizon/GTE

CLLI:
NESHWIXARS0

Switch Type:
Nokia/Lucent/Automatic Electric GTD-5 Remote

Prefixes Served:
(920) 368, 625

Notes:
Source: Joe M..

 

Oconto

Listing Updated:
August 2011

Operating Company:
Brightspeed/Centurylink/CenturyTel/Ameritech/ Wisconsin Telephone

CLLI:
OCNTWI11RS1

Switch Type:
Nokia/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:
Brightspeed/Centurylink/CenturyTel/Ameritech/ Wisconsin Telephone

CLLI:
OCFLWI11RS1

Switch Type:
Nokia/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:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(920) 685

Notes:
Source: Joe M..

 

Oostburg

Listing Updated:
September 2020

Operating Company:
Frontier/Verizon/GTE

CLLI:
OSBGWIXARS0

Switch Type:
Nokia/Lucent/Automatic Electric GTD-5 RSU

Prefixes Served:
(920) 564

Notes:
Source: E. Stadick

 

Oshkosh

Listing Updated:
June 2016

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

CLLI:
OSHKWI01DSA

Switch Type:
Ribbon/Genband/Nortel DMS-100

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

Notes:
Source: Joe M..

 

Princeton

Listing Updated:
September 2012

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
PRTNWI11DS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(920) 295

Notes:
 

 

Randolph

Photo 2

Listing Updated:
March 2009

Operating Company:
Brightspeed/Centurylink/CenturyTel/People's Telephone

CLLI:
RNDHWIXBDS1

Switch Type:
Nokia/Alcatel/Lucent 5ESS

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 M..

 

Random Lake

Listing Updated:
September 2020

Operating Company:
Frontier/Verizon/GTE

CLLI:
RNLKWIXADS0

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

Prefixes Served:
(920) 994

Notes:
Source: E. Stadick

 

Redgranite

Listing Updated:
August 2014

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
RDGRWI11DS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(920) 566

Notes:
Source: Joe M..

 

Ripon

Listing Updated:
May 2014

Operating Company:
Brightspeed/Centurylink/CenturyTel/PTI/Northwest Telephone

CLLI:
RIPNWIXADS2

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(920) 745, 748

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

 

Sister Bay

Photo 2

Listing Updated:
August 2020

Operating Company:
Frontier/Verizon/GTE

CLLI:
SSBYWIXADS0

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

Prefixes Served:
(920) 854

Notes:
Source: E. Stadick

 

Sturgeon Bay

Listing Updated:
August 2020

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

CLLI:
STBYWI11RS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 743, 746

Notes:
Source: E. Stadick

 

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 M..

 

Two Rivers

Listing Updated:
August 2020

Operating Company:
Frontier/Verizon/GTE

CLLI:
TWRVWIXADS0

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

Prefixes Served:
(920) 793-4

Notes:
Source: E. Stadick

 

Watertown

Photo 2

Listing Updated:
May 2014

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

CLLI:
WTTWWI01DSA

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(920) 206, 261-2

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

 

Waupun

Listing Updated:
May 2014

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

CLLI:
WAPNWI11RS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(920) 324

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

 

Wautoma

Listing Updated:
August 2014

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
WTMAWIXADS0

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

Prefixes Served:
(920) 787

Notes:
Source: Joe M..

 

Weyauwega

Listing Updated:
June 2011

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
WYWGWIXADS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(920) 867

Notes:
Source: Joe M..

 

Wild Rose

Listing Updated:
October 2021

Operating Company:
Brightspeed/Centurylink/CenturyTel

CLLI:
WLDRWIXADS1

Switch Type:
Ribbon/Genband/Nortel DMS-10 Host

Prefixes Served:
(920) 622

Notes:
Source: Joe M..

 

Winneconne

Listing Updated:
June 2016

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

CLLI:
WNCNWI11DS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(920) 582

Notes:
Source: Joe M..

 

Visit other Wisconsin Area Codes: 262 414 608 715 920

Visit nearby regions: Illinois Iowa Michigan Minnesota


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