FCC LICENSED CARRIER ·499 FILER ·STIR/SHAKEN CERTIFIED
SIPNEX
Call Center

Carrier voice infrastructure for contact centers.

SIP trunks, DIDs, toll-free, recording, and STIR/SHAKEN from a single FCC-licensed carrier. Inbound and outbound on the same trunk on the SIPNEX carrier network. Scale from 20 agents to 500 without changing carriers.

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Is SIPNEX a carrier or a reseller?

SIPNEX is an FCC-licensed telecommunications carrier with direct authorization, not a reseller. It files FCC Form 499, signs every outbound call with its own STIR/SHAKEN service provider (SP) certificate for A-level attestation, and is registered in the Robocall Mitigation Database. Contact centers connect to the SIPNEX carrier network over standard SIP trunks.

Unlimited Concurrent Channels

No caps on simultaneous calls. Scale from 20 agents to 500 without carrier-side changes. Your trunk grows with your operation. Built for high-volume outbound dialing.

A-Level STIR/SHAKEN

Every outbound call signed at A-level with our own STIR/SHAKEN service provider certificate. Verified caller identity on every call.

Local Presence DIDs

DIDs in every US area code for local caller ID matching. CID rotation pools. CNAM registration included. Bulk provisioning for large deployments.

Call Recording

Carrier-level recording linked to CDRs. Compliance documentation, quality assurance, training, and dispute resolution. State recording consent laws supported.

Real-Time CDRs

Call detail records with timestamps, duration, disposition, and caller/called numbers. Feed your analytics, compliance auditing, and billing reconciliation.

Compliance Infrastructure

STIR/SHAKEN attestation, RMD registration, call recording, CDR access. The carrier-layer foundation your TCPA compliance program needs.

Built for outbound dialer operators.

Dialer operators who run VICIdial, Asterisk, or FreePBX connect to SIPNEX over standard SIP. The trunk speaks plain SIP, so there is nothing proprietary to install. The dialer you already own keeps its campaigns, its lead lists, and its pacing rules.

Dialer traffic bills 12/6 — a 12-second minimum, then 6-second increments. Twilio and Telnyx voice bill 60/60, so every call is rounded up to the next full minute. A 20-second call bills as 24 seconds on 12/6 and as 60 seconds on 60/60. On short outbound calls, the increment can matter as much as the headline rate.

Per-minute rates are tiered by monthly volume and published on the pricing page. The published band is a ceiling: clean traffic profiles are quoted below it against actual CDRs. Compare minute rates and billing increments together — a low rate on 60/60 can cost more than a higher rate on 12/6. There are no per-channel, per-seat, or platform fees.

Every outbound call carries an A-level signature from our own STIR/SHAKEN service provider certificate. Nothing is inherited from an upstream carrier. Analytics engines treat partial (B) attestation as a lower-trust signal; no carrier publishes a specific answer-rate gap. Dialer-specific detail lives on the VICIdial carrier and predictive dialer carrier pages, and the VICIdial SIP trunk setup guide covers the carrier configuration step by step.

SIPNEX vs UCaaS contact center.

SIPNEXUCAAS CCaaS
Pricing modelPer-minute wholesalePer-seat ($50–$150/agent/mo)
100 agents, 1M min/mo$5,000–$12,000/mo$5,000–$15,000/mo + overages
Concurrent channelsUnlimitedPer-seat allocation
STIR/SHAKENA-level (own cert)Varies
Dialer supportVICIdial, Asterisk, any SIPPlatform-specific only
ContractNone12–36 months typical
CustomizationFull (your PBX, your rules)Platform-limited
Call recordingIncludedHigher tiers only

Frequently asked questions.

What does SIPNEX provide for call centers?
SIP trunks with unlimited concurrent channels and A-level STIR/SHAKEN signing. DIDs in every US area code for local presence, plus toll-free numbers and CNAM registration. Call recording infrastructure and real-time CDR access round it out. We provide the carrier-layer infrastructure. You provide the contact center software (VICIdial, Five9, Genesys, or any SIP-compatible platform).
Do you support both inbound and outbound operations?
Yes. Every SIP trunk and DID supports inbound and outbound simultaneously. Inbound calls route to your IVR, queues, or agents. Outbound calls use your DIDs as caller ID. Same trunk, same numbers, same carrier for both directions.
What dialer platforms are compatible?
Any SIP-compatible platform: VICIdial, Asterisk, FreePBX, FreeSwitch, Five9, Genesys, NICE inContact, Cisco UCCX, Avaya, 3CX, and any other system that supports standard SIP trunking. SIPNEX uses standard SIP protocol — no proprietary requirements.
How does SIPNEX help with call center compliance?
Our own STIR/SHAKEN certificate lets us sign every call at A-level attestation. We add call recording for consent documentation, real-time CDRs for auditing, and carrier-level traffic monitoring. TCPA consent, DNC scrubbing, and calling-hour enforcement stay your responsibility. We supply the infrastructure underneath.
What about call recording?
SIPNEX supports carrier-level call recording on all trunks. Recordings are linked to CDRs with timestamps for compliance documentation. Recording is compatible with state consent laws — play a disclosure before recording starts. See our call recording laws guide for state-by-state requirements.
Can I scale from 20 agents to 200 without changing carriers?
Yes. SIPNEX has no channel limits and no per-seat pricing. Your trunk handles 20 concurrent calls or 2,000 without any carrier-side changes. Add agents, increase dial volume, provision more DIDs — all without upgrading your trunk or renegotiating your carrier contract.
What does it cost to run a call center on SIPNEX?
Per-minute wholesale rates from $0.005 to $0.030 depending on volume. DIDs at $1 to $3 per month for local. No per-channel fees, no per-seat fees, no platform fees. A 100-agent outbound operation running 1 million minutes per month typically pays $5,000 to $12,000. That is a fraction of what UCaaS or CPaaS alternatives cost at equivalent scale.
Do you offer dedicated account management?
For operations running 500,000+ minutes per month, yes. You get a named account manager who knows your operation. They monitor trunk performance and advise on CID strategy, attestation, and capacity planning.

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