Get a local business phone number in Sullivan City, TX

What area code is Sullivan City, TX?

Sullivan City city is a Census place in Hidalgo County, Texas, with an estimated 3,900 residents in 2024. All 3 exchanges NANPA lists for its rate center are in area code 956. Sullivan City is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 956 are dialed as seven digits and toll calls as 1 plus ten digits.

Who holds Sullivan City phone exchanges

3 carriers hold the 3 exchanges assigned to Sullivan City's rate center. Onvoy, LLC - TX has the most, with 1. 3 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Sullivan City can come from any of these blocks; once it is yours, porting lets it move between providers.

Local prefixes for Sullivan City

A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Sullivan City. The earliest assignment date recorded in the file for these codes is 2017. 1 of the 3 were assigned in 2020 or later.

When Sullivan City's exchanges were assigned

Assignment dates show when each block of Sullivan City numbers was added to the local supply.

What makes a number local to Sullivan City

What a caller sees as "local" is the area code plus prefix. In Sullivan City, those come from the SULLIVANCY rate center, as recorded by NANPA.

Keeping an existing Sullivan City number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 956 when you pick it.

Businesses around Sullivan City

Sullivan City is part of the McAllen-Edinburg-Mission, TX metro area, home to 915,000 people in 2024. County Business Patterns counted 13,393 business establishments in the McAllen, TX metro area in 2023, employing 227,682 people. The largest sectors by establishment count are health care and social assistance (2,439), retail trade (2,190), and accommodation and food services (1,329).

A Sullivan City number on Callata

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in Sullivan City, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the McAllen, TX metro area, 17 users on RingCentral RingEX Core come to $510.00 a month and on Ooma Office Pro $424.15, at month-to-month list prices checked September 28, 2026. On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.