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(858)
Enter 7-digit phone number for area code 858 or the complete 10-digit phone number

Phone Prefixes for Area Code 858

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Area code Location Company / Service Provider
858-200 LA JOLLA, CA U.S. TELEPACIFIC CORP. - CA
858-201 San Diego, CA LEVEL 3 COMMUNICATIONS, LLC - CA
858-202 LA JOLLA, CA PACIFIC BELL
858-203 LA JOLLA, CA NEUTRAL TANDEM-CALIFORNIA, LLC - CA
858-204 POWAY, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-205 DEL MAR, CA T-MOBILE USA, INC.
858-206 POWAY, CA YMAX COMMUNICATIONS CORP. - CA
858-207 Rancho Bernardo, CA TELEPORT COMMUNICATIONS AMERICA, LLC - CA
858-208 POWAY, CA O1 COMMUNICATIONS, INC. - CA
858-209 DEL MAR, CA T-MOBILE USA, INC.
858-210 LA JOLLA, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-212 POWAY, CA SPRINT SPECTRUM L.P.
858-213 POWAY, CA SPRINT SPECTRUM L.P.
858-215 Rancho Penasquitos, CA PACIFIC BELL
858-216 Rancho Penasquitos, CA U.S. TELEPACIFIC CORP. - CA
858-217 Rancho Bernardo, CA U.S. TELEPACIFIC CORP. - CA
858-218 POWAY, CA U.S. TELEPACIFIC CORP. - CA
858-219 San Diego, CA AMERICAN MESSAGING SERVICES, LLC
858-220 LA JOLLA, CA SPRINT SPECTRUM L.P.
858-221 San Diego, CA LOCAL ACCESS SERVICES LLC - CA
858-222 LA JOLLA, CA YMAX COMMUNICATIONS CORP. - CA
858-223 San Diego, CA ONVOY, LLC - CA
858-224 LA JOLLA, CA CBEYOND COMMUNICATIONS, LLC - CA
858-225 San Diego, CA TNCI-OP-CO - CA
858-226 San Diego, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-227 Rancho Santa Fe, CA XO CALIFORNIA, INC.
858-228 LA JOLLA, CA XO CALIFORNIA, INC.
858-229 San Diego, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-230 LA JOLLA, CA AT&T CORP.
858-231 POWAY, CA T-MOBILE USA, INC.
858-232 LA JOLLA, CA NEW CINGULAR WIRELESS PCS, LLC
858-233 LA JOLLA, CA NORTH COUNTY COMMUNICATIONS CORP. - CA
858-234 Rancho Bernardo, CA NORTH COUNTY COMMUNICATIONS CORP. - CA
858-236 POWAY, CA NORTH COUNTY COMMUNICATIONS CORP. - CA
858-237 San Diego, CA NORTH COUNTY COMMUNICATIONS CORP. - CA
858-239 San Diego, CA BROADVOX-CLEC, LLC - CA
858-240 Rancho Penasquitos, CA LEVEL 3 TELECOM OF CALIFORNIA, LP - CA
858-242 LA JOLLA, CA NEW CINGULAR WIRELESS PCS, LLC
858-243 POWAY, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-244 San Diego, CA XO CALIFORNIA, INC.
858-245 LA JOLLA, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-246 LA JOLLA, CA LEVEL 3 TELECOM OF CALIFORNIA, LP - CA
858-247 LA JOLLA, CA T-MOBILE USA, INC.
858-248 POWAY, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-249 LA JOLLA, CA NEW CINGULAR WIRELESS PCS, LLC
858-250 LA JOLLA, CA WIDE VOICE, LLC - CA
858-251 LA JOLLA, CA PEERLESS NETWORK OF CALIFORNIA, LLC - CA
858-252 DEL MAR, CA T-MOBILE USA, INC.
858-253 San Diego, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
858-254 POWAY, CA SPRINT SPECTRUM L.P.
New numbers being added to 858 area code
Effective: 07/22/2017
858-209 in DEL MAR, CA
T-MOBILE USA, INC.
858 Area Code Information
Type of code: General Purpose Code
Location: CA - US
Time zone: P
Assigned for use: Yes
Code in service: Yes
Service date: June 12, 1999
In jeopardy: No
Relief in progress: No
NPA Relief status:
Code assignable: Yes
Geographic or
non-geographic:
G
Reserved for future use: No
Planning letter(s): 128
Overlay code: No
Overlay complex:
Dialing plan Standard Permissive
Home local calls: 7D 1+10D
Foreign local calls: 1+10D NA
Home toll calls: 7D 1+10D
Foreign toll calls: 1+10D -

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