Buy DID numbers in every area code. Direct from the wholesale carrier.

A wholesale DID number provider sells numbers from its own carrier inventory. It does not resell someone else’s stock. SIPNEX draws directly on NANPA-allocated numbering resources. So when you buy DID numbers from us, there is no upstream markup and no third-party provisioning queue. When a routing change is needed, you never wait on another company’s support desk.

DIDs are virtual numbers. They live on the network, not on a physical line, and route to your SIP endpoint over the internet. The same number works across our VoIP services. Point it at a SIP trunk, a hosted PBX extension, or a dialer platform like VICIdial. Reroute it whenever your operation changes. No new circuits, no new hardware.

Buying direct is also the cost-effective route. Reseller chains add margin at every hop. Many also bolt on setup and porting fees. SIPNEX charges neither. We operate the network end to end, so every number rides the same carrier-grade routes that carry our wholesale voice traffic.

What happens after you buy a DID number: we configure routing, register CNAM, and add the number to your STIR/SHAKEN authorized CID list. All of that is standard provisioning. Local DIDs are live within 24 hours. Every number handles inbound routing and outbound caller ID on the same SIP trunk from day one.

Most DID orders come down to five decisions. Settle them up front and provisioning moves fast.

1. Pick the number type. A local number carries a geographic area code. A toll-free number (800, 888, 877, 866, 855, 844, 833) has no geography and is free for the caller. A vanity number spells a word or a pattern. The comparison below covers all three.
2. Choose your area codes. For inbound calls, match the region your customers live in. For outbound campaigns, cover every area code you dial into so your caller ID reads local. Our area code guide maps codes to cities.
3. Decide where each number lands. Every DID gets a routing rule: a SIP trunk, a PBX extension, an IVR, or a dialer. One trunk can carry hundreds of DIDs, each with its own destination.
4. Give us your caller ID name. CNAM allows 15 characters. We register it during provisioning, so your business name shows on recipient phones.
5. Plan any ports. Numbers you already own move over with a Letter of Authorization. Simple ports take 7 to 14 business days. Start dialing on new SIPNEX DIDs while the port runs in the background. See how number porting works.

A local number has a geographic area code tied to a city or region: 214 for Dallas, 212 for New York, 305 for Miami. Recipients read it as a nearby business. That is why outbound teams build local presence pools. Inbound calls to a local number arrive on your trunk like any other call.

Toll-free phone numbers are free for the caller, not for the owner. The business pays for every inbound call. A toll-free number has no geography, so it works the same nationwide. As a registered RespOrg, SIPNEX reserves these numbers directly in the national toll-free registry. Details are on our toll-free numbers page.

A vanity number spells a word or repeats a pattern, like 1-800-FLOWERS. Vanity combinations are first-come, first-served in the toll-free registry. Because SIPNEX searches that registry directly, we can check whether a combination is open. Our vanity phone number guide covers how to pick one, and the toll-free vs local comparison goes deeper on performance.

A DID is only useful once it routes somewhere. On SIPNEX, inbound calls can land on a SIP trunk feeding your own PBX, on a hosted PBX extension, or on a dialer such as VICIdial. Microsoft Teams shops route DIDs through Teams Direct Routing. FreePBX operators can pair numbers with our FreePBX hosting. The routing rule is yours to change at any time.

Numbers that ring desk phones or softphones also need emergency calling. Kari’s Law and RAY BAUM’S Act set the rules for multi-line phone systems: direct 911 dialing, on-site notification, and a dispatchable location with each call. 911 rides the trunk your phones dial out on, so what matters is the Registered Location of each site where people sit. SIPNEX provisions E911 at turn-up, in the 50 US states. A DID pool used only for outbound caller ID does not change this.

Every provider says it sells DIDs. These six questions show whether it is a carrier or a reseller.

• Where do the numbers come from? A carrier assigns numbers from its own NANPA-allocated inventory. A reseller orders them from an upstream carrier and waits in that carrier’s queue.
• Who signs your calls? A-level attestation requires the signing carrier to know you as its customer and to have verified your right to use the number. If someone upstream signs, your calls fall to B-level. Partial (B) attestation reads as lower-trust to the analytics engines, and the specific answer-rate gap remains unpublished by every carrier. SIPNEX signs with its own STIR/SHAKEN certificate.
• Is CNAM included? Ask whether the caller ID name is registered during provisioning or sold as an add-on. Without a CNAM record, the recipient’s carrier has no name to look up. Our CNAM lookup guide explains how the name propagates.
• Can you leave with your numbers? FCC rules guarantee number portability. The FCC also permits carriers to charge porting fees as cost recovery, so ask what a port-out costs before you buy.
• How are inbound calls billed? Local and toll-free numbers bill differently. The owner of a toll-free number pays for every incoming call. Ask for the inbound rate on each type before you commit.
• Does the number come with E911? If the DID will ring a phone, it needs a Registered Location on file. Ask how address updates work when people move.