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Area Code 815
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Code 815 (and overlay Area Code 779) (Northeastern Illinois outside Chicago metro).
Click on the pictures below for a larger version.
Belvidere
Listing Updated:
October 2023Operating Company:
Frontier/Verizon/GTECLLI:
BLVDILXADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 544, 547Notes:
Source: GSV
Byron
Listing Updated:
September 2022Operating Company:
Frontier/Verizon/GTECLLI:
BYRNILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 234, 406Notes:
Source: GSV
Crystal Lake
Listing Updated:
October 2022Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
CRLKILCKDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 356, 444, 455, 459, 477, 479, 788Notes:
Current photo: GSV. Photo 2: E. Stadick (May 2020)
De Kalb
Listing Updated:
September 2023Operating Company:
Frontier/Verizon/GTECLLI:
DKLBILXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100/200Prefixes Served:
(815) 748, 752-3, 756, 758, 787Notes:
Source: GSV
Dixon
Listing Updated:
October 2023Operating Company:
CenturyLink/Gallatin River CommunicationsCLLI:
DIXNILXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100/200Prefixes Served:
(815) 284-5, 288Notes:
Source: GSV
Flanagan
Listing Updated:
May 2023Operating Company:
Frontier/Prairie Telephone CompanyCLLI:
FLNGILXADS0Switch Type:
Nokia/Siemens/Stromberg-Carlson DCOPrefixes Served:
(815) 796Notes:
Source: GSV
Frankfort
Listing Updated:
July 2024Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
FRFTILFBDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(708) 720
(815) 464, 469, 806Notes:
This CO has one prefix in NPA 708, the rest in NPA 815. Source: GSV
Freeport
Listing Updated:
August 2023Operating Company:
Frontier/Verizon/GTECLLI:
FRPTILXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100/200Prefixes Served:
(815) 232-3, 235, 266, 599Notes:
Source: GSV
Galena
Listing Updated:
May 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
GALNILGADS1Switch Type:
Nokia/Siemens EWSDPrefixes Served:
(815) 776-7Notes:
Source: GSV
Joliet
Listing Updated:
November 2022Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
JOLTILJODS1Switch Type:
Nokia/Siemens EWSD DE5 RSUPrefixes Served:
(779) 435
(815) 423, 424, 722, 723, 724, 726, 727, 740, 768, 774Notes:
Current photo: GSV. Photo 2: E. Stadick (August 2020)
Joliet West
Listing Updated:
June 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
JOLTILJWDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 725, 729, 730, 741, 744, 773Notes:
Current photo: GSV. Photo 2: E. Stadick (August 2020)
Kankakee
Listing Updated:
June 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
KNKKILKKDS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 614, 802, 928-9, 932-3, 935-7, 939Notes:
Source: GSV
La Salle
Listing Updated:
September 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
LSLLILLSDS0Switch Type:
Nokia/Alcatel/Lucent 5ESS HostPrefixes Served:
(815) 220, 223-4Notes:
Host switch for nearby Oglesby and Utica. Current photo: GSV. Photo 2: October 2008.
Lanark
Listing Updated:
June 2023Operating Company:
Frontier/CitizensCLLI:
LNRKILXADS0Switch Type:
Nokia/Siemens/Stromberg-Carlson DCOPrefixes Served:
(815) 493Notes:
Source: GSV
Lockport
Listing Updated:
August 2018Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
LCPTILLPDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 552, 588, 834, 836, 838Notes:
Source: GSV
Manhattan
Listing Updated:
August 2020Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
MNHTILMARS0Switch Type:
Ribbon/Genband/Nortel Remote Switching CenterPrefixes Served:
(815) 478Notes:
Source: E. Stadick
Mazon
Listing Updated:
April 2020Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
MAZNILMZRS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(815) 448Notes:
Source: FB
McHenry
Listing Updated:
August 2019Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
MCHNILMYDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 344, 363, 385, 578, 759Notes:
Source: GSV
McNabb
Listing Updated:
August 2023Operating Company:
McNabb Telephone CompanyCLLI:
MCNBILXADS0Switch Type:
Ribbon/Genband/Nortel CS 1500 SoftswitchPrefixes Served:
(815) 882Notes:
Source: GSV
Mendota
Listing Updated:
August 2023Operating Company:
Frontier/Verizon/GTECLLI:
MNDTILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 538-9Notes:
Source: GSV
Minooka
Listing Updated:
May 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
MINKILMKDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 467, 521Notes:
Source: GSV
Morris
Listing Updated:
November 2021Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
MRRSILMSDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 416, 941-2Notes:
Source: GSV
Morrison
Listing Updated:
June 2023Operating Company:
Frontier/CitizensCLLI:
MRSNILXADS0Switch Type:
Nokia/Siemens/Stromberg-Carlson DCOPrefixes Served:
(815) 772, 956Notes:
Source: GSV
Mount Carroll
Listing Updated:
July 2023Operating Company:
CenturyLink/Gallatin River CommunicationsCLLI:
MTCAILXARS0Switch Type:
Ribbon/Genband/Nortel RSSPrefixes Served:
(815) 244Notes:
Source: GSV
New Lenox
Listing Updated:
June 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
NWLNILNLDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 300, 462-3, 465Notes:
Source: GSV
New Milford
Listing Updated:
July 2022Operating Company:
Frontier/Verizon/GTECLLI:
NMFRILXADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 873-4Notes:
Source: GSV
Oregon
Listing Updated:
July 2023Operating Company:
Frontier/Verizon/GTECLLI:
ORGNILXARS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(815) 732Notes:
Source: GSV
Ottawa
Listing Updated:
June 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
OTWAILOTDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 431, 433-4Notes:
Source: GSV
Plainfield
Listing Updated:
October 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
PLFDILPLDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 254, 436, 439, 577, 609, 731Notes:
Source: GSV
Pontiac
Listing Updated:
July 2023Operating Company:
Frontier/Verizon/GTECLLI:
PNTCILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 842, 844Notes:
Source: GSV
Princeton
Listing Updated:
August 2023Operating Company:
Frontier/Verizon/GTECLLI:
PRTNILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 872, 875-6Notes:
Source: GSV
Rochelle
Listing Updated:
November 2022Operating Company:
Frontier/Verizon/GTECLLI:
RCHEILXADS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 561-2Notes:
Source: GSV
Rockford
"Main"
Listing Updated:
August 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
RCFRILRTDS1Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 489-90, 720, 961-9, 971-2, 987Notes:
Source: GSV
Rockford
"East"
Listing Updated:
August 2022Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
RCFRILREDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 227, 229. 231, 381, 387, 391, 394, 395, 397-9, 484Notes:
Source: GSV
Rockford
"Loves Park"
Listing Updated:
September 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
LVPKILRNDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 282, 633, 636-7, 639, 654, 877, 921Notes:
Source: GSV
Romeoville
Listing Updated:
June 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
RMVLILRMDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 293, 372, 407, 886Notes:
Source: GSV
Roscoe
Listing Updated:
September 2021Operating Company:
Frontier/Verizon/GTECLLI:
ROSCILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 623Notes:
Source: GSV
Sandwich
Listing Updated:
June 2023Operating Company:
Frontier/Verizon/GTECLLI:
SNDWILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 786Notes:
Source: GSV
Sterling
Listing Updated:
July 2023Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
STNGILSIDS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(815) 535, 548, 564, 622, 625-6, 631-2Notes:
Source: GSV
Streator
Listing Updated:
October 2022Operating Company:
Frontier/Verizon/GTECLLI:
STRTILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 257, 672-3Notes:
Source: GSV
Sycamore
Listing Updated:
October 2022Operating Company:
Frontier/Verizon/GTECLLI:
SYCMILXADS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 895, 899Notes:
Source: GSV
Tampico
Listing Updated:
June 2023Operating Company:
Frontier/CitizensCLLI:
TMPCILXADS0Switch Type:
Nokia/Siemens/Stromberg-Carlson DCOPrefixes Served:
(815) 438Notes:
Source: GSV
Tonica
Listing Updated:
November 2022Operating Company:
Tonica Telephone CompanyCLLI:
TONCILXADS0Switch Type:
Nokia/Siemens/Stromberg-Carlson DCOPrefixes Served:
(815) 442Notes:
Source: GSV
Watseka
Listing Updated:
October 2016Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
WTSKILWTDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 432Notes:
Source: GSV
Wonder Lake
Listing Updated:
August 2019Operating Company:
Frontier/Verizon/GTECLLI:
WNLKILXADS0Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAXPrefixes Served:
(815) 653, 728Notes:
Source: GSV
Woodstock
Listing Updated:
October 2022Operating Company:
at&t/SBC/Ameritech/Illinois BellCLLI:
WDSTILWSDS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(815) 206, 334, 337-8Notes:
Source: GSV
Visit other Illinois Area Codes: 217 309 312 618 630 708 773 815 847
Visit nearby regions: Indiana Iowa Kentucky Missouri Wisconsin
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Copyright 2024 Telephone Central Office Building
Pictures |