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Area Codes 860 & 959
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Codes 860 and 959 (Connecticut).

Click on the pictures below for a larger version.


Bristol
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
BRSTCT00DS0

Switch Type:
Nokia Siemens EWSD DE5

Prefixes Served:
(860) 314, 582-5, 589, 766
 

Notes:
Source: GSV

 

Canaan
 

Listing Updated:
May 2016

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CNANCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 824

Notes:
 

 

Canton
 

Listing Updated:
May 2016

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CNTNCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 693

Notes:
 

 

Colchester
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CLCHCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 537

Notes:
Source: GSV

 

Columbia
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CLMACT00RS4

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(860) x

Notes:
Source: GSV

 

Cornwall
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CRNWCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 672

Notes:
Source: GSV

 

Coventry
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CNTYCT00RS1

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(860) 742

Notes:
Source: GSV

 

Danielson
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
DNSNCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 774, 779

Notes:
Source: GSV

 

Deep River
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
DPRVCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 526

Notes:
Source: GSV

 

East Hampton

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
EHTNCT00RS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 267, 365
 

Notes:
Source: GSV

 

East Hampton

"Marlborough"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
MRLBCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) x

Notes:
Source: GSV

 

Enfield

"01 (Main)"
 

Listing Updated:
June 2015

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
ENFDCT01DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 253, 741, 745-6

Notes:
 

 

Enfield

"02 (Hazard)"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
ENFDCT02DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 272, 749, 763

Notes:
Source: GSV

 

 

Essex
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
ESSXCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 767

Notes:
Source: GSV

 

Farmington

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
FRTNCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 284, 409, 674, 676-9

Notes:
Source: GSV

 

Farmington

"Unionville (Avon)"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
UNVLCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 404, 673, 675

Notes:
Some sources list this as "Avon". Source: GSV

 

Glastonbury
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
GLBYCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 368, 633, 652, 657, 659, 682

Notes:
Source: GSV

 

Haddam

"Higganum"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
HGNMCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 345

Notes:
Source: GSV

 

Hartford

Photo 2 | Photo 3 | Photo 4
 

Listing Updated:
June 2015 / April 2014

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
HRFRCT03DS0
HRFRCT03DS1
HRFRCT03DS3

Switch Type:
DS0: Genband/Nortel DMS-100
DS1: Alcatel/Lucent 5ESS
DS3: Alcatel/Lucent 5ESS

Prefixes Served:
DS0: (860) 251, 270, 418, 422, 424, 504, 560, 595, 724, 765, 951

DS1: (860) 273, 277, 296, 403, 534, 545, 566, 692, 695, 702, 714, 723, 756-7, 947, 952-3, 956, 972, 986

DS3: (860) 240-1, 244, 246-7, 249, 275, 278, 280, 293, 297, 299, 308, 493, 520, 522, 524-5, 527, 541, 543, 547-9, 722, 725, 727-8, 948, 987

Notes:
Photos 3 and 4 were when this was AT&T

 

Hartford

"Bloomfield"
 

Listing Updated:
April 2014

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
BLFDCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 242-3, 286, 726, 768-9

Notes:
 

 

Hartford

"East Hartford (Brewer)"

Photo 2
 

Listing Updated:
June 2014

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
EHRTCT02DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 568-9, 895

Notes:
 

 

Hartford

"East Hartford (Chapman)"
 

Listing Updated:
June 2014

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
EHRTCT01DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 282, 289-91, 528, 557, 565, 610, 622

Notes:
 

 

Hartford

"Newington"
 

Listing Updated:
April 2014

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NWNTCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 353, 594, 660, 665-7, 696, 755, 878, 998

Notes:
 

 

Hartford

"West Hartford (Main)"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WHFRCT02DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 313, 521, 561

Notes:
Source: GSV

 

Hartford

"West Hartford (Prospect)"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WHFRCT01DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 231-3, 236, 371, 523, 570, 586

Notes:
Source: GSV

 

Hartford

"Wethersfield"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WTFDCT00DS0

Switch Type:
Alcatel/Lucnet 5ESS

Prefixes Served:
(860) 257-8, 513, 529, 563, 571, 721

Notes:
Source: GSV

 

Jewett City
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
JWCYCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 376

Notes:
Source: GSV

 

Kent
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
KENTCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 927

Notes:
Source: GSV

 

Lakeville
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
LKVLCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 435

Notes:
Source: GSV

 

Lebanon
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
LBNNCT00RS2

Switch Type:
Genband/Nortel RSC

Prefixes Served:
(860) 642

Notes:
Source: GSV

 

Litchfield
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
LTFDCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 567

Notes:
Source: GSV

 

Manchester

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
MNCHCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 533, 643, 645-7, 649

Notes:
Source: GSV

 

Manchester

"Wapping"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WPNGCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 644, 648

Notes:
Source: GSV

 

Middletown

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
MDTWCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 343-4, 346-7, 358, 636, 638, 685, 704

Notes:
Source: GSV

 

Middletown

"Cromwell"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
CRWLCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 613, 632, 635

Notes:
Source: GSV

 

Middletown

"Durham"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
DRHMCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 349

Notes:
Source: GSV

 

Middletown

"Portland"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
PTLDCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 342

Notes:
Source: GSV

 

Moodus
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
MODSCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 873

Notes:
Source: GSV

 

Mystic

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
MYSTCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 245, 536, 572

Notes:
Source: GSV

 

Mystic

"Stonington"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
SGTNCT00RS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 535, 599

Notes:
Also serves the Pawcatuck ratecenter. Source: GSV

 

New Britain

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NWBRCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 223-5, 229, 348, 612, 826-7, 832, 991

Notes:
Source: GSV

 

New Britain

"Berlin"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
BRLNCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 828-9

Notes:
Source: GSV

 

New London

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NWLNCT02DS1

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 271, 437, 439-40, 443-4, 447, 701

Notes:
Source: GSV

 

New London

"Groton"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
GRTNCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 396, 405, 433, 441, 445-6, 448-9, 629, 686, 694, 715, 732

Notes:
Source: GSV

 

New Milford
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NMFRCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 210, 350, 354-5

Notes:
Source: GSV

 

Niantic
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NINTCT00RS1

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 691, 739

Notes:
Source: GSV

 

Norfolk

Photo 2
 

Listing Updated:
May 2016

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NRFLCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 542

Notes:
 

 

North Thompson

"Thompson"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
THSNCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 923, 935

Notes:
Also serves Putnam ratecenter. Source: GSV

 

Norwich

"Main"
 

Listing Updated:
May 2013

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
NRWCCT00DS1

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 204, 312, 425, 823, 859, 862, 885-7, 889, 892

Notes:
Source: GSV

 

Norwich

"Baltic"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
BLTCCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 822

Notes:
Source: GSV

 

Norwich

"Montville"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
MTVLCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 367, 848

Notes:
Source: GSV

 

Old Saybrook

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
OLSYCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 388, 391, 395, 510

Notes:
Source: GSV

 

Old Saybrook

"Westbrook"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WSBKCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 399

Notes:
Source: GSV

 

Plainfield

Photo 2
 

Listing Updated:
June 2013

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
PLFDCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 230, 546, 564

Notes:
Also serves the Canterbury ratecenter. Source: Roberto in MA.

 

Plainville
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
PLVLCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 410, 641, 747, 793

Notes:
Also serves the Bristol ratecenter. Source: GSV

 

Putnam
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
PTNMCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 928, 963

Notes:
Source: GSV

 

Rockville
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
RKVLCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 870-2, 875, 896

Notes:
Source: GSV

 

Sharon
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
SHRNCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 364

Notes:
Source: GSV

 

Simsbury

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
SMBYCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 408, 651, 658, 843

Notes:
Source: GSV

 

Simsbury

"Granby"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
GRNBCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 653, 844

Notes:
Source: GSV

 

Southington
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
STTNCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 276, 378, 620-1, 628, 681

Notes:
Source: GSV

 

Stafford Springs
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
STSPCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 684

Notes:
Source: GSV

 

Storrs
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
STRSCT01RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 429, 487

Notes:
Source: GSV

 

Torrington

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
TRTNCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 482, 485, 489, 496, 626, 689

Notes:
Also serves the Harwinton ratecenter. Source: GSV

 

Torrington

"Goshen"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
GSHNCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 491

Notes:
Source: GSV

 

Washington
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WASHCT00RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 868

Notes:
Source: GSV

 

Watertown
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WTTWCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 274, 945

Notes:
Source: GSV

 

Willimantic

"Main"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WLMNCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 423, 450, 456, 465

Notes:
Source: GSV

 

Willimantic

"Hampton"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
HMPNCT00RS2

Switch Type:
Genband/Notel RSC

Prefixes Served:
(860) 455

Notes:
Source: GSV

 

Windsor

Photo 2
 

Listing Updated:
April 2014

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WNDSCT00DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(860) 285, 298, 580, 607, 624, 683, 687-8, 731, 905

Notes:
 

 

Windsor Locks

Photo 2 | Photo 3


 

Listing Updated:
June 2015 / June 2013

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WLKSCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 204, 312, 425, 823, 859, 862, 885-7, 889, 892

Notes:
Photo 3 was when this was AT&T.

 

Windsor Locks

"Suffield"
 

Listing Updated:
July 2017

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
SFFDCT00RS2

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(860) 668

Notes:
Source: GSV

 

Winstead
 

Listing Updated:
May 2016

Operating Company:
Frontier/at&t/SBC/Southern New England Telephone

CLLI:
WNSTCT00DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(860) 379, 738

Notes:
 

 

 


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