All locations › Houston
Houston Business Phones for Energy, Medical and Port-Driven Businesses
Houston is home to the Texas Medical Center, the largest medical complex in the world, and the Port of Houston, the nation’s largest port by foreign tonnage. The metro is also the center of the US energy industry, with many energy company headquarters. TX3’s hosted PBX gives Houston businesses a phone system that stays reachable when a single office loses power or internet.
Hosted PBX, Business VoIP and Cloud Phone Systems for Houston Businesses
Hosted PBX in Houston
A hosted PBX lets an office, a yard and a field crew share one main number, with auto attendants and call queues that send customers to dispatch, scheduling or accounting.
Houston VoIP Pricing
Teams of 20+ users sit on the Enterprise tier at $150 per month plus a flat $0.03 per minute, with E911 at $1.95 per month per primary or location DID. See TX3 pricing for what each tier includes and the business VoIP cost guide for the cost model.
Business Phone Systems for Offices and Field Sites
Use Polycom, Yealink or Cisco SIP desk phones from TX3 or your own in the office, and the mobile app for supervisors and technicians who are away from a desk.
Cloud Phone System for Storm Season
Gulf Coast storms can interrupt power and internet at an office. With a cloud phone system, the main number can forward to cell phones and staff can answer on the mobile app from wherever they are. Support is available 24/7.
A Sample Monthly Estimate for a Houston Team
Picture a Houston industrial-services company with 40 extensions across an office and a yard. At 40 extensions on the Enterprise tier, that is a $150 platform fee, plus 40 extensions x 200 minutes x $0.03 = $240 in usage, plus E911 at $1.95 per month for two location numbers = about $393.90 a month. This is an estimate that assumes about 200 minutes per extension per month, the same sample used on our cost comparison page, and it leaves out taxes and fees. Your real usage and quote will differ. See pricing for what each tier includes.
Area Codes and Nearby Areas We Serve
Greater Houston uses 713, 281, 832 and 346, which all cover the same area, and 621 was added in January 2025 as a fifth overlay code that is assigned only after the others run out. Existing numbers do not change, and you can port a number to keep it. We also serve Dallas-Fort Worth and Miami along the southern US, and TX3 is based in Enumclaw, Washington and serves businesses anywhere in the US.
Frequently Asked Questions
What area codes does Houston use?
Houston uses 713, 281, 832 and 346, and 621 as the newest overlay. All of them cover the same geographic area, so a business can be assigned any of them, and local calls are dialed with the area code.
Can a Houston company with field crews and a yard use a hosted PBX?
Yes. The yard, the office and crews on the road can share one main number and call queue, with the mobile app on each person's extension. Read the hosted PBX vs VoIP guide to see how a cloud system differs from one tied to a single building.
Ready for a Houston phone system that stays reachable in any weather?
Tell us how many extensions you need and how your team works, and we will put together a plan. Or call Sales at (888) 438-9375.