Wholesale VoIP. Direct from the carrier.
Volume-tiered voice termination, wholesale SIP trunking, and bulk DIDs from an FCC-licensed carrier. No intermediary markup. A-level STIR/SHAKEN at every tier. White-label ready. No long-term contract.
What wholesale VoIP is.
Wholesale VoIP is voice service sold at carrier volume rates — per-minute termination, SIP trunk capacity, and phone number inventory purchased in bulk by businesses that resell voice or run heavy call volume. SIPNEX is an FCC-licensed wholesale VoIP carrier: we hold direct authorization, sign with our own STIR/SHAKEN certificate, and sell from our own network.
The buyers are operators, not end users. VoIP resellers packaging trunks and numbers under their own brand. ITSPs building a retail voice product that needs a termination layer underneath. CLECs that need off-net termination beyond their own footprint. MSPs bundling voice into managed IT contracts. Call centers pushing enough monthly minutes that retail per-seat pricing stops making sense. Different businesses, same requirement: carrier economics, measured in fractions of a cent per minute.
The economics are blunt. Retail voice is priced per seat, per channel, or per feature bundle, with margin baked into every layer. Wholesale voice is priced per minute, in 6-second increments, at a rate that drops as your volume climbs. Once you pass a few hundred thousand minutes a month, that spread is the difference between a voice product with margin and a voice product without one.
Here is the problem with most of this market: the wholesale label gets applied to anyone with a rate deck. A large share of wholesale voice offers come from resellers buying from aggregators who buy from carriers. Every layer in that chain adds margin to your per-minute rate, adds a signaling hop to your post-dial delay, and pushes your STIR/SHAKEN attestation one step further from the certificate that actually signs the call. When your upstream's upstream has a routing problem, you find out from your customers.
Carrier-direct removes the chain. SIPNEX holds direct FCC authorization — not a reseller arrangement. We file our own FCC Form 499. We sign every call with our own SP-KI certificate, which is why A-level attestation applies to every trunk at every volume tier. We are registered in the Robocall Mitigation Database and registered as a RespOrg for toll-free. Rates are volume-tiered and published on the pricing page, billed in 6-second increments, with tier assignment automatic from your actual monthly usage. No long-term contract, no setup fees, no per-channel fees. That is the difference between a VoIP wholesale carrier and a reseller with a spreadsheet.
Volume-Tiered Pricing
Wholesale rates that fall as volume rises — $0.025-$0.030/min at entry tier down to $0.005-$0.008/min at 10M+ minutes. 6-second billing increments. Published tiers, no quote gate.
FCC-Licensed Carrier
Buy from the carrier, not from another reseller. SIPNEX holds its own FCC license, 499 filing, STIR/SHAKEN certificate, and RMD registration. Your wholesale relationship is with the infrastructure owner.
A-Level Attestation Included
Every call on every wholesale trunk receives A-level STIR/SHAKEN attestation, signed with our own SP-KI certificate. No attestation upsell. No B-level default. Included at every volume tier.
White-Label Capability
Resell SIPNEX carrier capacity under your own brand. Your customers see your company, your rates, your support. We provide the invisible infrastructure underneath.
Nationwide DID Inventory
US DIDs across all area codes with same-day provisioning for most orders. Volume discounts on bulk purchases. CNAM registration and A-level attestation included with every number.
No Long-Term Contract
No minimum term, no early-termination penalty, no setup fees, no porting fees, no per-channel fees. Volume tiers assigned automatically from actual monthly usage — scale without renegotiating.
Wholesale carrier services, defined.
Wholesale carrier services are the network building blocks a reseller, ITSP, or MSP buys from a licensed carrier instead of building in-house: voice termination, SIP trunking, DID inventory, toll-free routing, and A2P messaging. SIPNEX supplies the full stack from one network, one account, one rate structure.
Termination is the core product. Wholesale voice termination is per-minute delivery of your outbound calls to the PSTN at volume rates — the line item that dominates cost for any high-volume operation. SIPNEX terminates with sub-3-second average PDD, native G.711u pass-through with G.729 fallback, and 6-second billing increments. No transcoding tax, no rounding up to the next full minute.
Wholesale SIP trunking is the capacity layer — the trunks your platform registers against and pushes traffic through. SIPNEX trunks carry unlimited concurrent channels with no per-channel fees, so a burst from 200 to 800 simultaneous calls is a traffic pattern, not a contract amendment. New trunks are provisioned in 24 hours.
Numbers are the inventory side. SIPNEX carries nationwide US DID inventory with CNAM registration included on every number, same-day provisioning for most orders, and volume discounts on bulk purchases. Resellers stocking hundreds of numbers a month buy at wholesale, not per-number retail.
For 8XX traffic, SIPNEX is a registered RespOrg — we control toll-free number routing directly rather than brokering through a third party. That matters the day you need to move a customer's toll-free number or reroute traffic fast.
A2P SMS rides the same account, so text messaging on your DIDs does not require a second vendor. And if you are packaging all of this under your own brand, the SIPNEX VoIP reseller program is built for exactly that: white-label arrangements where your customers see your brand and your rates while SIPNEX runs the carrier layer underneath. At 1M+ minutes per month, direct SIP peering is available to cut latency between your switch and ours.
How to choose a wholesale VoIP provider.
The wholesale VoIP providers in any search result look interchangeable on the surface — everyone claims great rates and great quality. The differences live in licensing paperwork, signing certificates, and contract fine print. This is the checklist we would use to evaluate any provider, including us.
The three kinds of wholesale VoIP providers
Every offer you will evaluate comes from one of three layers. A facilities-based carrier terminates on its own network under its own FCC authorization — the layer everything else resells. An aggregator blends routes from several carriers and arbitrages between them, which is why quality shifts week to week without notice. A VoIP wholesaler at the retail edge resells an aggregator with a margin and a support inbox. Each layer down adds cost, post-dial delay, and distance between your traffic and the certificate that signs it. The checklist below exists to tell you which layer you are actually talking to.
- Licensing depth. Ask whether the provider holds direct FCC authorization or operates under someone else's. Ask for their FCC Form 499 filer status and Robocall Mitigation Database registration. A carrier answers in one sentence; a middleman changes the subject. SIPNEX holds direct authorization, files its own Form 499, and is RMD-registered.
- Attestation ownership. Who signs your calls? A provider with its own STIR/SHAKEN SP-KI certificate controls attestation on its own authority. A reseller inherits whatever its upstream signs — and B-level attestation quietly erodes answer rates. SIPNEX signs directly and applies A-level attestation on all trunks at every tier.
- Rate transparency. Published volume tiers beat quote-gated rate decks. Check the billing increment — 6-second billing versus 60-second rounding changes real cost on short-duration traffic. SIPNEX publishes its tiers, from $0.025-$0.030/min at entry volume down to $0.005-$0.008/min at 10M+ minutes.
- Quality metrics. Ask for ASR and ACD on the specific routes you send, not network-wide averages, and ask what post-dial delay looks like under load. SIPNEX runs sub-3-second average PDD. A provider unwilling to discuss route-level performance is telling you something.
- Interop and codecs. Confirm native codec pass-through before you commit. SIPNEX passes G.711u natively with G.729 fallback — no forced transcoding — and interops with VICIdial, Asterisk, FreeSWITCH, and standard SIP platforms without exotic configuration.
- Contract terms. Month-to-month should be the default, not a concession. Look for setup fees, porting fees, per-channel fees, platform fees, and early-termination penalties — SIPNEX charges none of them. Volume tier movement should be automatic from usage, not an annual renegotiation.
- Provisioning speed. A carrier that controls its own network turns up trunks in 24 hours and provisions most DIDs same-day. Multi-week onboarding usually means your provider is waiting on their provider.
Run this checklist against any wholesale voice provider before you move traffic. Better yet, run it during a live trial: send a slice of production traffic, watch ASR and PDD from your own switch, and compare invoices at 6-second granularity. SIPNEX provisions trunks in 24 hours precisely so that test costs you an afternoon, not a quarter. If the numbers hold, move volume — tier pricing follows your usage automatically.
Frequently asked questions.
What is wholesale VoIP?
Who is wholesale VoIP for?
What volume tiers do you offer?
Can I resell SIPNEX trunks to my customers?
Do wholesale trunks get A-level STIR/SHAKEN?
What about DID provisioning at wholesale?
Do you offer direct peering?
What are the contract terms?
What are wholesale carrier services?
How is wholesale VoIP different from buying from a VoIP reseller?
What does wholesale VoIP cost?
Wholesale VoIP from the carrier.
Not from a reseller of a reseller. From the carrier.