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Grand Terrace, CA Area Codes
Grand Terrace, California (population 12,936) uses area codes 909 and 840.
Grand Terrace has no telephone exchange of its own in NANPA records; it is served by the Colton exchange about 2.8 km away.
Carriers with Grand Terrace numbers
51 prefixes are assigned to the Colton exchange: 16% mobile, 20% VoIP and cable, 65% landline.
| Carrier | Prefixes |
|---|---|
| AT&T (Pacific Bell) | 20 |
| Spok | 5 |
| AT&T Mobility | 3 |
| Verizon Wireless | 3 |
| Lumen (Level 3) | 3 |
| Verizon Business (MCImetro) | 2 |
| Bandwidth | 2 |
| Onvoy (Sinch) | 2 |
Area codes used in Grand Terrace
| Area code | Prefixes serving Grand Terrace | Main carriers in this code |
|---|---|---|
| 909 | 45 | Frontier, T-Mobile, AT&T Mobility |
| 840 | 6 | T-Mobile, Fractel, Onvoy (Sinch) |
Grand Terrace phone number prefixes
Numbers starting with these first six digits were originally assigned to the Colton exchange.
909-213AT&T Mobility909-216Spok909-219Verizon Wireless909-222Twc Ip Enabled Services909-254Tpx Communications909-264Verizon Wireless909-370AT&T (Pacific Bell)909-410Spok909-420AT&T (Pacific Bell)909-422AT&T (Pacific Bell)909-423AT&T (Pacific Bell)909-424AT&T (Pacific Bell)909-426AT&T (Pacific Bell)909-430AT&T (Pacific Bell)909-431AT&T (Pacific Bell)909-432Spok909-433AT&T (Pacific Bell)909-439AT&T (Pacific Bell)909-498Matrix Telecom. S/I/I Tnci909-503Verizon Business (MCImetro)909-512AT&T (Pacific Bell)909-514AT&T (Pacific Bell)909-533Lumen (Level 3)909-535Spok909-554AT&T (Pacific Bell)909-572Bandwidth909-580AT&T (Pacific Bell)909-639Onvoy (Sinch)909-645AT&T Mobility909-653Verizon Business (MCImetro)909-679Onvoy (Sinch)909-692American Messaging Services909-699Bandwidth909-777AT&T (Pacific Bell)909-783AT&T (Pacific Bell)909-807Utility Telecom Group909-814Spok909-824AT&T (Pacific Bell)909-825AT&T (Pacific Bell)909-835Lumen (Level 3)909-857American Messaging Services909-872AT&T (Pacific Bell)909-876AT&T (Pacific Bell)909-953AT&T Mobility909-954Lumen (Level 3)840-228Verizon Wireless840-235Commio840-257T-Mobile840-281T-Mobile840-336Fractel840-600Fractel
Nearby cities in area code 909
- San Bernardino
- Fontana
- Ontario
- Rancho Cucamonga
- Pomona
- Rialto
- Chino
- Upland
- Chino Hills
- Redlands
- Eastvale
- Highland
Questions
- What is the area code for Grand Terrace, CA?
- Grand Terrace uses 2 area codes: 909 and 840. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Grand Terrace in?
- Grand Terrace is in the Pacific time zone.