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Area Codes 630 & 331
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Codes 630 & 331 (Illinois).

Click on the pictures below for a larger version.


Aurora

"Main"
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
AURRILARDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 256, 264, 801, 844, 859, 892, 896-7, 906, 966

Notes:
Source: GSV

 

Aurora East

"Main"
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
AURRILAEDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 236, 375, 499, 585, 692, 820, 851, 862, 898, 978

Notes:
Source: GSV

 

Bartlett
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
BRTLILBTDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 213, 289, 372, 483, 540, 736, 830, 837
(847) 798

Notes:
Source: GSV

 

Bensenville

Photo 2 | Photo 3 | Photo 4
 

Listing Updated:
July 2020

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
BNSVILBVDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 227, 238, 250, 285, 350, 467, 521, 595, 616. 694, 766, 773, 775, 787, 860, 875
(847) 957

Notes:
Source: JDD

 

Bolingbrook
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
BGBKILBKDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 226, 312, 378, 679, 759, 771

Notes:
Also serves parts of Lemont. Source: GSV

 

Downers Grove
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
DWGVILDGDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 241, 271, 275, 322, 434-5, 493, 663, 769, 795

Notes:
Source: GSV

 

Elburn
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
ELBNILEURS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(630) 365

Notes:
Source: GSV

 

Elmhurst
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
EMHRILETDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(331) 221
(630) 279, 415, 516, 530, 617, 758, 782, 832-4, 941, 956, 993

Notes:
Source: GSV

 

Geneva

"Main"

Photo 2 | Photo 3
 

Listing Updated:
July 2020

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
GENVILGNDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 208, 232, 262, 345, 365, 377, 406, 443, 444, 482, 513, 584, 587, 761, 762, 840, 845, 879

Notes:
Source: E. Stadick

 

Glen Ellyn
 

Listing Updated:
July 2020

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
GLELILGEDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 469, 545, 790, 858, 942

Notes:
Source: E. Stadick

 

Hinsdale
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
HNDLILHIDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 230, 321, 323, 325, 455, 654, 655, 734, 789, 794, 850, 856, 887, 920, 986

Notes:
Source: GSV

 

Kaneville
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
KAVLILKARS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(630) 557

Notes:
Source: GSV

 

Lemont
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
LEMTILLEDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 243, 257, 914

Notes:
Source: GSV

 

Lemont North
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
LEMTILLNDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 252, 427, 739, 783 , 910, 972, 985

Notes:
Source: GSV

 

Lombard

Photo 2
 

Listing Updated:
January 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
LBRDILLMDS0
LBRDILLMDS0

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

Prefixes Served:
DS0: (630) 221, 261, 268, 407, 678, 752, 792, 916
DS1: (630) 424, 458, 495, 543, 620, 627, 628, 629, 652, 691, 693, 705, 889, 932, 953

Notes:
Source: E. Stadick

 

Naperville

"Main"
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
NPVLILNADS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 305, 355, 357, 369, 416, 420, 428, 527, 548, 579, 637, 646, 717-8, 753, 778, 798, 813, 848, 904, 922, 961, 983

Notes:
Source: GSV

 

Oak Brook
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
OKBRILOADS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 218, 368, 472, 537, 571-5, 586, 623, 645, 684, 706, 722, 928, 954, 990

Notes:
Source: GSV

 

Oswego
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
OSWGILOSDS0

Switch Type:
Nokia/Siemsns EWSD DE5 RCU

Prefixes Served:
(630) 551, 554

Notes:
Source: GSV

 

Plano
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
PLANILPORS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(630) 552

Notes:
Source: GSV

 

Roselle
 

Listing Updated:
July 2020

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
RSLLILRZDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 295, 307, 314, 351, 529, 539, 582, 603, 612, 671, 893-4, 905, 924, 980
(847) 301, 352, 524, 534, 584, 891, 895, 923, 985

Notes:
Source: E. Stadick

 

Sugar Grove
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
SGGVILSVDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 466

Notes:
Source: GSV

 

Warrenville
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
WNVLILWVDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(630) 393, 836

Notes:
Source: GSV

 

West Chicago
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
WCHCILWCDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(630) 231, 293, 562, 876

Notes:
Source: GSV

 

Wheaton
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
WHTNILWHDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(630) 260, 384, 462, 510, 588, 653, 665, 668, 681-2, 690, 784, 871, 933

Notes:
Source: GSV

 

Yorkville
 

Listing Updated:
April 2021

Operating Company:
at&t/SBC/Ameritech/Illinois Bell

CLLI:
YRVLILYORS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(630) 381, 553

Notes:
Source: GSV

 

Visit other Illinois Area Codes: 217 309 312 618 630 708 773 815 847

Visit nearby regions: Indiana Iowa Kentucky Missouri Wisconsin


Copyright 2021 Telephone Central Office Building Pictures
Page last modified April 8, 2021
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