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Area Code 956
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 956 (Lower and middle Rio Grande Valley, Texas).

Click on the pictures below for a larger version.


Brownsville

"Lincoln"
 

Listing Updated:
March 2023

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
BWVLTXLIDS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(956) 296, 504, 541-2, 544, 546-8, 550, 554, 574, 579, 698, 755, 882, 982-3, 986

Notes:
Source: GSV

 

Brownsville

"Olmito"
 

Listing Updated:
July 2022

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
BWVLTXOLRS2

Switch Type:
Nokia/Alcatel/Lucent 5ESS Remote

Prefixes Served:
(956) 350

Notes:
Source: GSV

 

Brownsville

"Terminal"
 

Listing Updated:
August 2022

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
BWVLTXTERS0

Switch Type:
Ribbon/Genband/Nortel RLM

Prefixes Served:
(956) 831-2, 838

Notes:
Source: GSV

 

Donna
 

Listing Updated:
March 2022

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
DONNTXDODS0

Switch Type:
Ericsson AXE-10

Prefixes Served:
(956) 461, 464

Notes:
Source: GSV

 

Edinburg
 

Listing Updated:
March 2025

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
EDBGTXEBDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(956) 287, 289, 292, 316, 318, 380-1, 383-8, 393, 587, 665

Notes:
Source: GSV

 

Falcon

"Zapata"
 

Listing Updated:
May 2024

Operating Company:
Border To Border Communications

CLLI:
ZPTATXXADS0

Switch Type:
Mitel GX5000 Digital Switch

Prefixes Served:
(956) 936

Notes:
Source: GSV

 

Harlingen
 

Listing Updated:
May 2023

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
HRLNTXHGDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(956) 228, 291, 364-6, 389, 392, 412, 421, 423, 425, 427-8, 430, 440, 444, 577, 610, 730, 752, 760

Notes:
Source: GSV

 

La Feria
 

Listing Updated:
February 2023

Operating Company:
Frontier/Verizon/GTE

CLLI:
LAFRTXXADS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(956) 797

Notes:
Source: GSV

 

Laredo

"Main"
 

Listing Updated:
May 2024

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
LARDTXLADS0

Switch Type:
Nokia/Alcatel/Lucent 5ESS

Prefixes Served:
(956) 273, 523, 693, 712, 717-8, 721-9, 753, 764, 786, 790-1, 794-6

Notes:
Source: GSV

 

McAllen

"Main"
 

Listing Updated:
February 2025

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
MCALTXMUDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(956) 217, 362, 429, 578, 618, 630-2, 661, 664, 668, 682-3, 686-8, 872, 926, 928, 971-2, 992, 994

Notes:
Source: GSV

 

Mercedes
 

Listing Updated:
June 2022

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
MRCDTXMEDS0

Switch Type:
Ericsson AXE-10

Prefixes Served:
(956) 514, 585, 825

Notes:
Source: GSV

 

Mission

"Main"
 

Listing Updated:
March 2025

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
MSSNTXMIDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(956) 205, 323, 424, 519, 580-1, 583-5

Notes:
Source: GSV

 

Pharr
 

Listing Updated:
March 2025

Operating Company:
at&t/SBC/Southwestern Bell

CLLI:
PHRRTXPHDS0

Switch Type:
Ribbon/Genband/Nortel DMS-100

Prefixes Served:
(956) 283, 702, 781-4, 787

Notes:
Source: GSV

 

Raymondville
 

Listing Updated:
April 2023

Operating Company:
Frontier/Verizon/GTE

CLLI:
RMVLTXXADS0

Switch Type:
Ribbon/Genband/Nortel DMS-10

Prefixes Served:
(956) 398, 689-90

Notes:
Source: GSV

 

Rio Grande City
 

Listing Updated:
July 2022

Operating Company:
Frontier/Verizon/GTE

CLLI:
RGCYTXXADS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(956) 487-8, 573, 716

Notes:
Source: GSV

 

Roma
 

Listing Updated:
November 2021

Operating Company:
Frontier/Verizon/GTE

CLLI:
ROMATXXADS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(956) 847, 849

Notes:
Source: GSV

 

Weslaco

"Main"
 

Listing Updated:
July 2022

Operating Company:
Frontier/Verizon/GTE

CLLI:
WSLCTXXADS0

Switch Type:
Nokia/Alcatel/Lucent/Automatic Electric GTD-5 EAX

Prefixes Served:
(956) 447, 647, 968-9

Notes:
Source: GSV

 

Visit other Texas Area Codes: 210 214 254 281 325 361 409 432 512 713 806 817 830 903 915 936 940 956 972 979

Visit nearby regions: Arkansas Louisiana New Mexico Oklahoma


Copyright 2025 Telephone Central Office Building Pictures
Page last modified April 25, 2025
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