Area Code 712
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 712 (Iowa).

Click on the pictures below for a larger version.

Council Bluffs "Downtown"	Listing Updated: April 2020 Operating Company: CenturyLink/Qwest/US West/Northwestern Bell CLLI: CNBLIAWADS1 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (712) 322-3, 325-6, 328-9, 352, 388, 396 Notes: Source: GSV
Sioux City "Downtown"	Listing Updated: April 2020 Operating Company: CenturyLink/Qwest/US West/Northwestern Bell CLLI: SXCYIADTDS1 Switch Type: Ribbon/Genband/Nortel DMS-100/200 Prefixes Served: (605) 232, 235 (712) 233-4, 252, 255, 258, 277, 279, 293-4 Notes: Also serves North Sioux City, SD. Source: GSV
Sioux City "Leeds"	Listing Updated: April 2020 Operating Company: CenturyLink/Qwest/US West/Northwestern Bell CLLI: SXCYIALDRS2 Switch Type: Ribbon/Genband/Nortel Remote Switching Center Prefixes Served: (712) 239 Notes: Source: GSV
Sioux City "Morningside"	Listing Updated: April 2020 Operating Company: CenturyLink/Qwest/US West/Northwestern Bell CLLI: SXCYIAMSDS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (712) 266, 274, 276 Notes: Source: GSV

Visit other Iowa Area Codes: 319 515 563 641 712

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