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Area Code 636
Telephone Central Office
Pictures
The following are representative examples of telephone central office buildings in Area Code 636 (western suburbs of St. Louis, Missouri).
Click on the pictures below for a larger version.
Antonia
Listing Updated:
July 2021Operating Company:
at&t/SBC/Southwestern BellCLLI:
ANTOMO50RS2Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 942, 948Notes:
Also serves part of the Antonia MCA rate center (636-942). This houses a remote hosted from the Fenton, MO CO 5ESS. Current photo: GSV. Photos 2-3: July 2010
Cedar Hill
Listing Updated:
September 2013Operating Company:
at&t/SBC/Southwestern BellCLLI:
CDHLMO51RS0Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 274, 285Notes:
Also serves Cedar Hill MCA (636-274). CO is located in east central Missouri. It houses a remote hosted by the Fenton, MO 5ESS switch. The building was built by the same firm which produced the Antonia office, the similarities are striking. Obviously, Cedar Hill has experienced more growth during the 80s and 90s as Hiway 30 was improved to a divided highway with limited access. Current photo: GSV. Photo 2: July 2010
Chesterfield
Listing Updated:
November 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
CHFDMO52DSASwitch Type:
Nokia/Alcatel/Lucent 5ESS HostPrefixes Served:
(636) 247, 519, 530, 532, 536-7, 720, 730, 733, 735-7Notes:
This office was built in the middle of an empty field in the 1990 time frame. It was a single floor structure and it was built specifically to house the first 5ESS ISDN switch in Southwestern Bell. It provided ISDN services to the Advanced Technology lab of SBC and to the AT&T Network Systems (forerunner of Lucent) building at 1111 Woodsmill Road. Since that time much has been built around this office and, when it became necessary to add a second floor the city of “Town & Country” required a ton of aesthetic work to make the office fit into the residential setting. So they put on a fancy tin roof and a wall on the right side of the building which hides the emergency AC generator located there. Current photo: GSV. Photo 2: July 2010
Defiance
Listing Updated:
July 2023Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
DFNCMOXARS2Switch Type:
Ribbon/Genband/Nortel RSSPrefixes Served:
(636) 798, 987Notes:
Also serves Definace MCA (660-798). This town is another one founded by Daniel Boone and is west of Weldon springs, Missouri. Current photo: GSV. Photo 2: July 2010
De Soto
Listing Updated:
June 2019Operating Company:
at&t/SBC/Southwestern BellCLLI:
DESTMOGIRS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(636) 337, 586Notes:
Also serves De Soto MCA (573-337). It houses a DMS remote hosted by the Festus DMS100. De Soto is a railroad town which has a large switchyard in it. This is an old photo, it now has the AT&T logo signage on it. Current photo: GSV. Photo 2: July 2010
Eureka
Listing Updated:
May 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
EURKMO53RS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(636) 587, 938Notes:
Also serves Eureka MCA (636-938). It is home to a Remote Switch Module (RSM) hosted by the Chesterfield 5ESS switch. This area really took off in the last 35 years driven by the opening of the “Six Flags” amusement park and the development of a couple of golf course developments. It is one of the largest Remote Switch entities in the country. Current photo: GSV. Photo 2: July 2010
Fenton
Listing Updated:
April 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
FNTNMO54DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(636) 305, 326, 343, 349, 717Notes:
Also serves Fenton MCA. This CO is located in St. Louis county. It houses a 5ESS switch which was installed in the second floor addition. This CO was home to 2 Exchanges DAvis for lowest call rates and DIamond for people who needed to call downtown St Louis a lot. When the Meramec river (a tributary of the Mississippi) gets high this office has to be protected from flooding. Current photo: GSV. Photos 2-3: July 2010
Festus-Crystal City
"Festus"
Listing Updated:
August 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
FSTSMOYEDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 931, 933, 937Notes:
Also serves Festus-Crystal City MCA (636-931). It is home to a DMS100 host switch. From the eastern side it appears to be a single story building but the view from the west shows that it is a 2 story building. Outside plant construction maintains a staff on the first floor of this building. Current photo: GSV. Photos 2-3: July 2010
Gray Summit
Listing Updated:
June 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
GRSMMO55RS2Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(636) 451, 742Notes:
Also serves the Gray Summit MCA rate center. It houses a Remote Switch module hosted by the Chesterfield 5ESS. This is a small farming community west of St. Louis county. It is a cinder block building which has been painted with an unusual light blue paint. Current photo: GSV. Photos 2-3: October 2010
Harvester
"Main"
Listing Updated:
June 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
HVTRMO67DSASwitch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 441-2, 447, 477, 498, 722, 851, 922, 926, 928, 936, 939Notes:
Also serves the Harvester MCA rate center. It is the home to a DMS100 switch. This area has grown like weeds in the 1990s. Current photo: GSV. Photo 2: July 2010
Harvester
"Weldon Spring"
Listing Updated:
August 2018Operating Company:
at&t/SBC/Southwestern BellCLLI:
WDSPMO01DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 261, 300, 329, 344, 362Notes:
This was one of the last new Class 5 switches installed in the Saint Louis metropolitan area. The building is only about 1 year old in this picture. It replaced a small CO east of this location with the old DLC used to serve the once tiny subscriber base. Current photo: GSV. Photos 2-3: July 2010
Herculaneum-Pevely
"Pevely"
Listing Updated:
August 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
PVLYMOAARS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(636) 475, 479Notes:
Also serves Herculaneum-Pevely MCA rate center (636-475). This is a new building built to house the remote switch hosted by the DMS100 in Festus. Pevely is a familiar name in every St. Louis household since the dairy farm based there is still the largest in the eastern Missouri area. “White in the bottle, pink on the cheeks, pinky, pinky Pevely.” Was the old advertising motto. Current photo: GSV. Photo 2: July 2010
High Ridge
"Main"
Listing Updated:
June 2023Operating Company:
at&t/SBC/Southwestern BellCLLI:
HGRGMO56RS2Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 376, 677Notes:
Also serves High Ridge MCA rate center (636-677). It houses an RSM hosted by the Fenton 5ESS switch. This area grew rapidly after Highway 30 was improved from a 2 lane road to divided, limited access highway in 1980. This once rural community is now a very popular bedroom community for St. Louis. Current photo: GSV. Photos 2-3: July 2010
High Ridge
"House Springs"
Listing Updated:
November 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
HGRGMO57RS2Switch Type:
Nokia/Alcatel/Lucent 5ESS RSMPrefixes Served:
(636) 375, 671Notes:
Also serves House Springs MCA (636-671). This houses an RSM which is hosted by the Maxville 5ESS. It should have been hosted by the Fenton 5ESS but that switch was not ready in time to host this replacement for the old Step by Step switch. This was an old farm agency building for the early Southwestern Bell Telephone Company. It was an old farm house in which the wife and children worked for SWBT as operators on a manual switch board until automatic dialing via Step by Step was invented. The building has no indoor plumbing, hence the portable toilet out front.
When the RSM was placed in the 1980s, SWBT had to dig a basement under the CO for the power plant. Current photo: GSV. Photo 2: July 2010
Hillsboro
Listing Updated:
July 2010Operating Company:
at&t/SBC/Southwestern BellCLLI:
HLBOMO66RS1Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(636) 789, 797Notes:
Also serves Hillsburo MCA (636-797). This office houses a remote switch hosted by the DMS100 in Festus, MO. Hillsboro is the county seat for Jefferson county.
Imperial
Listing Updated:
June 2021Operating Company:
at&t/SBC/Southwestern BellCLLI:
IMPRMO58RS2Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 461, 464, 467, 525Notes:
It houses a remote switch module hosted by the Maxville 5ESS switch. It is a prime example of Telephone architecture in the 1970s, no windows, no ornamentation, no business office, purely functional building space. Current photo: GSV. Photo 2: July 2010
Manchester
Listing Updated:
June 2023Operating Company:
at&t/SBC/Southwestern BellCLLI:
MNCHMO59DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(636) 207, 227, 230, 256, 386, 391, 394, 527, 891Notes:
It is situated in West St. Louis county and houses a 5ESS switch. There are only a few 5ESS Optical Remote Modules which have ever been “rehomed”, on of them is now hosted in this office. When ISDN service was first turned up in St. Louis the VP of Lucent in this location needed to have ISDN service so he could interact with the president & CEO of SWBT over ISDN lines so the ORM at that site was hosted by the Chesterfield 5ESS switch. Only Lucent lines were to be assigned to that ORM but, over time, residential and business customers in adjoining properties got assigned to it. When the building had to be demolished for a shopping center the remote had to be rehomed on the nearest 5ESS in the rate center boundaries and that is Manchester. Current photo: GSV. Photos 2-3: July 2010
Marthasville
Listing Updated:
July 2010Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
MTVLMOXARS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(636) 242, 433Notes:
Also serves Marthasville MCA (636-242). A CO in eastern Missouri.
Maxville
Listing Updated:
June 2023Operating Company:
at&t/SBC/Southwestern BellCLLI:
MXVLMO60DSASwitch Type:
Nokia/Alcatel/Lucent 5ESS HostPrefixes Served:
(636) 282, 287, 296Notes:
Also serves Maxville MCA. It is home for a 5ESS switch which hosts the House Springs, Missouri remote switch. This switch is in Maxville but serves the much larger town of Arnold. This blond brick is not very common in AT&T. Current photo: GSV. Photo 2: July 2010
O'Fallon
Listing Updated:
July 2021Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
OFLNMOXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100/200Prefixes Served:
(636) 240, 272, 281, 379, 474, 978, 980Notes:
It is located south of Wentzville and is relatively new, less than 30 years old. Current photo: GSV. Photo 2: July 2010
Pacific
Listing Updated:
May 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
PCFCMO61RS0Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 257, 271Notes:
Also serves Pacific MCA. This office houses a remote switch hosted by the Valley Park 5ESS switch. Pacific is a little farm town west of Eureka, MO. Current photo: GSV. Photo 2: July 2010
Pond
Listing Updated:
July 2021Operating Company:
at&t/SBC/Southwestern BellCLLI:
PONDMO62RS4Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(636) 273, 405, 422, 458Notes:
Also serves Pond MCA. It houses an RSM hosted by the Chesterfield 5ESS. This office is just west of Manchester but is extremely difficult to find. This is the front entrance of the building but it does not face the road it is on, from the road all you see is a driveway to largish building which stands with its back to you. The only giveaway is an occasional AT&T truck parked in the lot in front of the office. I have never seen another AT&T CO that remotely resembles it. Current photo: GSV. Photo 2: July 2010
St. Charles
Listing Updated:
June 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
STCHMO63DSASwitch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 255, 443, 723-4, 896, 916, 925, 940, 946-7, 949Notes:
Houses a Nortel DMS100 switch and serves the St. Charles county seat. The office is the toll collection center for all traffic from Northeast Missouri. It is built on a heavily sloped street so that from one view it appears to be a 4 story building but from the other corner, only a hundred yards north, it appears to be a 3 story building. Saint Charles was the first capitol city of the state of Missouri being displaced by Jefferson City after the capitol building there was finished. Current photo: GSV. Photo 2: July 2010
St. Clair
Listing Updated:
June 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
STCLMOMARS0Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 322, 629Notes:
Also serves St. Clair MCA (636-322). It houses a remote switch hosted by the Valley Park 5ESS switch. The pay phone no longer exists there. Current photo: GSV. Photo 2: August 2010
St. Peters
Listing Updated:
June 2022Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
STPRMOXADS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 278-9, 397, 970Notes:
Source: GSV
Troy
Listing Updated:
August 2018Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
TROYMOXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 462, 528Notes:
Source: GSV
Union
Listing Updated:
June 2022Operating Company:
at&t/SBC/Southwestern BellCLLI:
UNINMOLURS0Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 583-4, 744Notes:
Also serves Union MCA (636-744). A 5ESS remote hosted by Valley Park CO. Office used to host operators in the early days, and the reason for the windows. Current photo: GSV. Photo 2: July 2010
Valley Park
Listing Updated:
June 2023Operating Company:
at&t/SBC/Southwestern BellCLLI:
VYPKMO64DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(636) 225-6, 517, 529, 825, 827, 861Notes:
Also serves Valley Park MCA. Office houses a No. 5 ESS switch. The town was a resort for the rich of St. Louis in the late 1890s and early 1900s. It suffered a long slide until about 20 years ago, when the Corps of Engineers figured out that they needed to stop people from rebuilding houses on the Merrimac river after floods. The town is positively robust now and a huge amount of new housing has new access and/ or DSL lines from this central office. Current photo: GSV. Photos 2-3: August 2010
Warrenton
Listing Updated:
November 2023Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
WRTNMOXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(636) 377, 456Notes:
Source: GSV
Washington
Listing Updated:
September 2023Operating Company:
at&t/SBC/Southwestern BellCLLI:
WASHMOBERS0Switch Type:
Nokia/Alcatel/Lucent 5ESS EXMPrefixes Served:
(636) 221, 239, 390, 432Notes:
Also serves Washington MCA (636-432). This office houses an RSM hosted by the Valley Park 5ESS. In December 2009 Uverse became available for subscribers in this Missouri river town. The top floor was added for a 2BESS switch which was subsequently replaced by the remote switch module. Current photo: GSV. Photo 2: August 2010
Wentzville
Listing Updated:
July 2021Operating Company:
Brightspeed/CenturyLink/CenturyTelCLLI:
WNVLMOXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100/200Prefixes Served:
(636) 327, 332, 639Notes:
Also serves Wentzville MCA (636-332). It serves Wentzville, the home of the GM plant in eastern Missouri. Current photo: GSV. Photo 2: July 2010
Visit other Missouri Area Codes: 314 417 573 636 660 816
Visit nearby regions: Arkansas Illinois Iowa Kansas Kentucky Nebraska Oklahoma Tennessee
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Copyright 2024 Telephone Central Office Building
Pictures |