US-licensed Tier-1 carrier

Wholesale Voice that routes the world.

A-Z termination, DID origination, and toll-free on a Tier-1 network — billed by the second, attested by STIR/SHAKEN, monitored 24/7.

180+ destinationsASR up to 64%MOS 4.4 avg
Routing Console · NOC
LIVE
ASR
62.4%
PDD
1.2s
MOS
4.4
Live callslast 60s
+1 415 ···+44 20 ···Connected00:42
+1 212 ···+91 22 ···Connected01:18
+1 305 ···+49 30 ···Ringing00:04
+1 646 ···+61 2 ···Connected02:51
STIR/SHAKEN
A-level attestation
A-level
STIR/SHAKEN attestation
180+
Destinations covered
99.99%
Network uptime SLA
<1.2s
Median PDD globally
Voice Products

Three voice services. One Tier-1 carrier.

Buy termination, origination, and toll-free as a bundle — or pick the one you need today and add the others when you scale.

MOST USED

A-Z Termination

Tier-1 routes to 180+ destinations with carrier-grade quality and transparent price tiers per destination.

  • Direct peering with US Tier-1s
  • Premium + Standard route tiers
  • Per-second billing
  • STIR/SHAKEN attestation
Request a quote

DID Origination

Local & national numbers across 60+ countries, instant provisioning.

  • Local, national & mobile DIDs
  • E911 ready (US & CA)
  • Bulk porting in 5-7 business days
  • Carrier-of-record options
Request a quote

Toll-Free

US RespOrg control, vanity numbers, and ring-to-anywhere routing.

  • 8XX RespOrg ownership
  • Vanity number search & port
  • RoboCall mitigation
  • SMS-enabled toll-free
Request a quote
Call Flow

Every call. Five reliable steps.

From SIP INVITE to CDR archive, your traffic moves through a deterministic pipeline engineered for sub-second decisions.

01
Originate

Call enters via your SIP trunk, validated against your IP allowlist & TLS.

02
Authenticate

STIR/SHAKEN signs the call and assigns an attestation level (A/B/C).

03
Best-route

LCR engine picks the optimal Tier-1 path on ASR, MOS, and price weights.

04
Failover

If the primary route degrades, traffic instantly hops to the secondary peer.

05
Terminate

Carrier delivers the call. CDR + media metrics stream back to your portal.

Rate Calculator

See what you'll save vs. retail rates.

Pick a destination, enter your monthly minute volume, and we'll show you Teloz wholesale pricing next to typical retail. No login required.

  • Per-second billing, no rounding
  • No setup fees or minimum commits
  • Volume tiers refresh monthly
Estimated savings
per month, USD
Retail
$6,000
Teloz
$2,100
You save
$3,90065%
Live · last 24h
Answer-Seizure Ratio
62%+2.4% vs yesterday
000204060810121416182022
Min
58%
Avg
61.5%
Max
64%
Quality Monitoring

See your routes, not your invoices.

Every CDR feeds the dashboard in under 3 seconds. Watch ASR, PDD, and MOS by hour, by destination, by route — and set alerts that page your NOC the moment a peer drifts. Metrics are reported in line with ITU-T E.164 numbering standards.

  • Per-route quality scoring
    ASR · PDD · MOS · ACD · jitter
  • Real-time alerts
    Slack, PagerDuty, webhook
  • 90-day metric history
    Drill down by destination & peer
Why Teloz

What you get when the carrier is the carrier.

12ms
avg latency
Tier-1 peering

Direct routes — no middlemen.

We peer directly with Verizon, AT&T, T-Mobile, BT, Deutsche Telekom and 40+ other Tier-1s. Calls get the shortest path, lowest latency, and the best rates — without resold capacity.

VerizonAT&TBTTelstra+40 more
A-level
attestation
Compliance built-in

STIR/SHAKEN, TRACED, & CLI integrity.

Every outbound call is signed with A-level attestation. We block spoofed CLIs in real time, file your TRACED Act robocall mitigation plan, and ship CDRs that meet FCC retention rules.

A-attestationRMD certifiedTRACED ActFCC 501
5 min
response SLA
Carrier-grade NOC

Humans on the line, 24/7.

Our US-based NOC watches every route around the clock. Routes drift, CLIs get blocked, peers go dark — we open the ticket before you do, and our SLA backs the credit.

24/7/3655-min responseSLA-backedUS-based
~/teloz-voice
1# Place an outbound call via Teloz API
2curl https://api.teloz.io/v1/calls \
3 -H 'Authorization: Bearer $TELOZ_KEY' \
4 -H 'Content-Type: application/json' \
5 -d '{
6 "from": "+14155550142",
7 "to": "+442071838750",
8 "route": "premium"
9 }'
Developer-first

Plug in with SIP, REST or SDK.

Provision a trunk in 90 seconds. Use raw SIP, our REST API, or our typed SDKs for Node, Python, Go, and PHP. Zero proprietary protocols, zero vendor lock-in.

RFC-3261 SIP
Standards only
TLS + SRTP
End-to-end encryption
Webhook callbacks
On every CDR + state
Postman collection
+ OpenAPI spec
Open the docs

Wholesale voice partners scaling on Teloz.

From resellers to BPOs to outbound dialers — Tier-1 voice, day-one.

VO
VP of Voice Operations
Austin, TX
Cost + ASR lift

Switching our outbound voice to Teloz cut our per-minute spend by 38% and ASR climbed 6 points the same week.

Verified Customer
DR
Director of Carrier Relations
Seattle, WA
Lowest PDD

We tested four wholesale carriers head-to-head. Teloz had the lowest PDD and the only NOC that called us first when a peer drifted.

Verified Customer
HT
Head of Outbound Sales Tech
Denver, CO
A-level attestation

STIR/SHAKEN A-level attestation alone moved our answer rate from 41% to 49% on cold-call campaigns. The math wrote itself.

Verified Customer
NL
Network Operations Lead
Miami, FL
3-day onboarding

Interconnect was live in three business days. The portal showed our first CDRs streaming in before our SIP engineer's coffee was cold.

Verified Customer
Thousands of US teams
4.8/5on G2
4.9/5on Capterra

Also available through our wholesale VoIP platform

Wholesale Voice FAQs

The short answers.

Everything carriers, resellers, and dialer ops ask before going live.

Most partners are sending production traffic within 5 minutes of signup using IP authentication. Full SIP credentials and IP allowlist updates can be applied without restarting your trunk.

Per-second from the first second, no rounding. Most peers also offer 6/6 (six-second initial, six-second increment) on premium routes — pick whichever fits your invoicing model.

Yes. Outbound US traffic is signed A-level when the calling party owns or has been verified for the CLI. B and C attestation are applied automatically when full attestation isn't possible — ensuring you stay compliant with FCC TRACED Act requirements.

Both work. Use Teloz-provisioned DIDs for the fastest provisioning, or port your existing inventory in 5-7 business days for US local & toll-free, 10-15 days for international where porting is supported.

Mid-call failover is not initiated (calls in progress complete on the original path), but new INVITEs immediately route to the secondary peer. Our LCR re-evaluates route health every 60 seconds; degraded peers are removed from rotation in under 90 seconds.

Yes. Tiered CPS commits and channel-based pricing are available on Enterprise contracts (typically 100+ concurrent channels). Talk to carrier sales for a quote tailored to your traffic profile.

US: Ashburn, Dallas, Los Angeles, Chicago, Atlanta, NYC. EMEA: London, Frankfurt, Amsterdam. APAC: Singapore, Sydney, Tokyo. Direct anycast routing keeps PDD under 1.2s globally.

Test our routes against yours. No contract, no commitment.

Sandbox trunk with $20 in test credit, live in 5 minutes. Run your traffic for 7 days against real Tier-1 routes — keep what works, walk away from what doesn't.

5-min provisioning$20 test creditPer-second billing24/7 NOC support