National Phone Number Registry NPNR

(331)
Enter 7-digit phone number for area code 331 or the complete 10-digit phone number

Phone Prefixes for Area Code 331

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Area code Location Company / Service Provider
331-200 BARTLETT, IL T-MOBILE USA, INC.
331-201 DOWNERS GROVE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-202 ELMHURST, IL SPRINT SPECTRUM L.P.
331-203 AURORA, IL SPRINT SPECTRUM L.P.
331-204 NAPERVILLE, IL NEUTRAL TANDEM-ILLINOIS, LLC - IL
331-205 AURORA, IL T-MOBILE USA, INC.
331-206 AURORA, IL SPRINT SPECTRUM L.P.
331-207 YORKVILLE, IL LEVEL 3 COMMUNICATIONS, LLC - IL
331-208 AURORA, IL SPRINT SPECTRUM L.P.
331-209 ELMHURST, IL LEVEL 3 COMMUNICATIONS, LLC - IL
331-210 ST CHARLES, IL PEERLESS NETWORK OF ILLINOIS, LLC - IL
331-212 AURORA, IL MCI WORLDCOM COMMUNICATIONS, INC. - IL
331-213 NAPERVILLE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-214 DOWNERS GROVE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-215 NAPERVILLE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-216 OSWEGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
331-218 WHEATON, IL T-MOBILE USA, INC.
331-219 AURORA, IL TELNYX LLC
331-220 AURORA, IL SPRINT SPECTRUM L.P.
331-221 ELMHURST, IL AMERITECH ILLINOIS
331-222 ST CHARLES, IL NEW CINGULAR WIRELESS PCS, LLC - IL
331-223 ST CHARLES, IL NEW CINGULAR WIRELESS PCS, LLC - IL
331-225 ELMHURST, IL SPRINT SPECTRUM L.P.
331-226 NAPERVILLE, IL T-MOBILE USA, INC.
331-227 Sugar Grove, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-228 ST CHARLES, IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
331-229 NAPERVILLE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-230 AURORA, IL T-MOBILE USA, INC.
331-233 DOWNERS GROVE, IL TELNYX LLC
331-234 Sugar Grove, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-236 WHEATON, IL T-MOBILE USA, INC.
331-240 W CHICAGO, IL PEERLESS NETWORK OF ILLINOIS, LLC - IL
331-245 BARTLETT, IL T-MOBILE USA, INC.
331-248 GENEVA, IL COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL
331-250 AURORA, IL T-MOBILE USA, INC.
331-251 DOWNERS GROVE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-252 Warrenville, IL TELEPORT COMMUNICATIONS AMERICA, LLC - IL
331-253 LEMONT, IL T-MOBILE USA, INC.
331-254 Sugar Grove, IL T-MOBILE USA, INC.
331-256 AURORA, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-262 AURORA, IL SPRINT SPECTRUM L.P.
331-263 ITASCA, IL NEUTRAL TANDEM-ILLINOIS, LLC - IL
331-276 ST CHARLES, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-281 NAPERVILLE, IL AMERITECH ILLINOIS
331-300 AURORA, IL T-MOBILE USA, INC.
331-301 AURORA, IL LOCAL ACCESS LLC - IL
331-302 AURORA, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
331-303 ELBURN, IL CIBOLO CREEK VENTURES, LLC DBA ROUTEPOINT COMM IL
331-304 BARTLETT, IL T-MOBILE USA, INC.
331-305 NAPERVILLE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
New numbers being added to 331 area code
Effective: 06/03/2017
331-230 in AURORA, IL
T-MOBILE USA, INC.
Effective: 06/02/2017
331-236 in WHEATON, IL
T-MOBILE USA, INC.
331 Area Code Information
Type of code: General Purpose Code
Location: IL - US
Time zone: C
Assigned for use: Yes
Code in service: Yes
Service date: October 07, 2007
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): 362 357 195
Overlay code: Yes
Overlay complex: 331/630
Dialing plan Standard Permissive
Home local calls: 1+10D NA
Foreign local calls: 1+10D NA
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -

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