National Phone Number Registry NPNR

Area Code 443 Location

Area code 443 is currently assigned for use in Maryland since Jun 01, 1997. This area code originated from the 410 area code previously by means of area code split or overlay. View all phone prefixes used in area code 443 or other area codes in Maryland.

(443)
Enter 7-digit phone number for area code 443 or the complete 10-digit phone number

Phone Prefixes for Area Code 443

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Area code Location Company / Service Provider
443-200 WOODLAWN, MD ALLEGIANCE TELECOM, INC. - MD
443-201 Westminster, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-202 BALTIMORE, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-203 WEST RIVER, MD VERIZON MARYLAND, INC.
443-204 PIKESVILLE, MD NEW CINGULAR WIRELESS PCS, LLC - DC
443-205 CAMBRIDGE, MD SPRINT SPECTRUM L.P.
443-206 PERRYVILLE, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-207 ELKTON, MD OMNIPOINT COMMUNICATIONS ENTERPRISES, L.P.
443-208 BALTIMORE, MD SPRINT SPECTRUM L.P.
443-209 HAVREGRACE, MD CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD
443-210 SALISBURY, MD SPRINT SPECTRUM L.P.
443-212 SPARKSGLNC, MD US LEC OF MARYLAND, INC.
443-213 PIKESVILLE, MD VERIZON MARYLAND, INC.
443-214 ANNAPOLIS, MD NEW CINGULAR WIRELESS PCS, LLC - DC
443-215 Chestertown, MD CORE COMMUNICATIONS, INC. - MD
443-216 DUNDALK, MD CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD
443-217 ANNAPOLIS, MD CORE COMMUNICATIONS, INC. - MD
443-218 Worthington, MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
443-219 PARKVILLE, MD LEVEL 3 COMMUNICATIONS, LLC - MD
443-220 BALTIMORE, MD VERIZON MARYLAND, INC.
443-221 ANNAPOLIS, MD LEVEL 3 COMMUNICATIONS, LLC - MD
443-222 Worthington, MD XO MARYLAND, LLC
443-223 ANNAPOLIS, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-224 BALTIMORE, MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
443-225 CAMBRIDGE, MD SPRINT SPECTRUM L.P.
443-226 BALTIMORE, MD SPRINT SPECTRUM L.P.
443-227 PT DEPOSIT, MD CTC COMMUNICATIONS CORP. - MD
443-228 CHASE, MD US LEC OF MARYLAND, INC.
443-229 Severna Park, MD CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD
443-230 ODENTON, MD CTC COMMUNICATIONS CORP. - MD
443-231 ESSEX, MD AT&T LOCAL
443-232 WILLARDS, MD CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD
443-233 VIENNA, MD CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD
443-234 SNOW HILL, MD CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD
443-235 SALISBURY, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-236 CARDIFF, MD CORE COMMUNICATIONS, INC. - MD
443-237 North Beach, MD CORE COMMUNICATIONS, INC. - MD
443-238 PARKTON, MD CTC COMMUNICATIONS CORP. - MD
443-239 EASTON, MD NEW CINGULAR WIRELESS PCS, LLC - DC
443-240 BALTIMORE, MD NEW CINGULAR WIRELESS PCS, LLC - DC
443-241 Westminster, MD GLOBAL NAPS SOUTH, INC. - MD
443-242 Sparrows Point, MD CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD
443-243 FALLSTON, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-244 Westminster, MD LEVEL 3 COMMUNICATIONS, LLC - MD
443-245 ELKTON, MD CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD
443-246 ELKTON, MD CORE COMMUNICATIONS, INC. - MD
443-247 Union Bridge, MD CTC COMMUNICATIONS CORP. - MD
443-248 BALTIMORE, MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
443-249 Stevensville, MD VERIZON MARYLAND, INC.
443-250 BALTIMORE, MD SPRINT SPECTRUM L.P.
443 Area Code Information
Type of code: General Purpose Code
Location: MD - US
Time zone: E
Assigned for use: Yes
Code in service: Yes
Service date: June 01, 1997
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): 427 299 266 IL96/06-008
Overlay code: Yes
Overlay complex: 410/443/667
Dialing plan Standard Permissive
Home local calls: 10D 1+10D
Foreign local calls: 10D 1+10D
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -

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