Tonga country code, +676 explained.
Everything you need to call Tonga with Twiching — full dialing format, step-by-step guide, and Tier-1 CLI routes that land every call.
Tonga
Nuku'alofa · Oceania
· COUNTRY INFO · VERIFIED
ISO Alpha-2
TO
Capital
Nuku'alofa
Region
Oceania
Timezone
Pacific/Tongatapu
· DIALING GUIDE · VERIFIED
FULL DIAL FORMAT
011 · +676 · XXXXXXX
How Tonga numbers break down
A complete number to Tonga follows this pattern. Twiching adds the exit and country codes automatically when you dial from the app.
EXIT CODE
Dial from the US/Canada to leave the country.
COUNTRY CODE
Routes the call directly into Tonga.
LOCAL NUMBER
The subscriber's local number.
COMPLETE NUMBER FORMAT
011 · +676 · XXXXXXX
Tonga on the map
Nuku'alofa · Oceania
ROUTE
Tier-1 Direct
CLI
Verified
ASR
60%+ min
SIP trunking and local numbers for Tonga
Instead of leasing a physical line in Tonga, a Twiching SIP trunk routes your existing PBX or softphone traffic through a local +676 number — same call quality, none of the on-the-ground infrastructure.
Local +676 caller ID
Calls display a recognisable Tonga number instead of an unfamiliar international one.
SIP trunking
Route your existing PBX or softphone through Twiching's Tier-1 trunk — no hardware swap.
Minutes to provision
Numbers activate in the dashboard the same day, with no on-the-ground carrier contract.
+676
Tonga · ready to provision today
Tier-1 delivery into Tonga, end to end
Direct interconnects with Tonga Communications Corporation (TCC) and the wider Tonga network mean calls skip lower-tier wholesale transit entirely, on every call, not just high-volume routes.
Tonga
+676
191
Countries in directory
TONGA INCLUDED
99.97%
Call delivery rate
STIR/SHAKEN
500+
Carrier interconnects
TIER-1 DIRECT
60%+
Guaranteed ASR
REAL-TIME ROUTING
How Tonga phone numbers are structured
Numbering Format
COUNTRY
+676
LOCAL
XXXXXXX
Tonga's plan is closed: dial country code +676 followed directly by a 7-digit number. There's no area code layer to account for.
Carriers & language
Tonga has 41% internet penetration and is served by 2 major mobile networks (Tonga Communications Corporation (TCC), Digicel Tonga). VoIP is permitted and regulated by Tonga Communications Commission (TCC). The local currency is TOP and the primary language is Tongan, which shape IVR prompts, SMS content, and business-hours handling.
Oceania context
Oceania's networks are geographically spread across wide time-zone gaps, so time-aware dialing and resilient international routes matter most here.
Skipping the exit code
Tonga calls from the US need 011 first, then +676 — the exit code isn't optional.
Adding an area code that doesn't exist
There's no area-code layer in Tonga's closed plan — just +676 followed by the 7-digit subscriber number.
Ignoring the time difference
Tonga runs on Pacific/Tongatapu. Check local hours before dialing so calls don't land outside business time.
Compliance, carriers & rates for Tonga
Permitted — Tonga Communications Corporation regulated
Regulated by Tonga Communications Commission (TCC)
Tonga's regulatory posture under Tonga Communications Commission (TCC) is permissive toward VoIP, meaning a business can start calling and texting into the country without a separate compliance process.
- VoIP is permitted and regulated under the Tonga Communications Act by the Communications Commission.
- Service providers must obtain a licence and meet quality-of-service requirements.
- Consumer rights protections and number portability rules are enforced by the regulator.
Direct Tier-1 interconnect with Tonga Communications Corporation (TCC) — no wholesale transit in between.
US → Tonga
$0.13/min
Tonga → US
$0.13/min
Billed per second, not rounded to the minute
How businesses use a Tonga number
Nuku'alofa-recognisable numbers
Callers in Nuku'alofa and across Tonga see a familiar +676 prefix rather than a number they don't recognise and won't pick up.
Sales & support in one line
The same Tonga number handles inbound support and outbound sales calls, both landing on Tier-1 routes into Tonga Communications Corporation (TCC) and the wider network.
Time-zone-aware routing
Calls into Tonga route to whichever team is on shift for Pacific/Tongatapu, instead of ringing a desk that's already gone home.
SIP trunking for market entry
Stand up a Tonga presence on SIP trunking before committing to local infrastructure — the same number scales from a pilot to full local hiring.
FAQ
Calling Tonga — frequently asked questions
Nuku'alofa is the capital of Tonga. A local +676 number is recognisable to callers there and nationwide, which is part of why presenting local caller ID tends to improve answer rates across the whole country, not just the capital.
Tonga uses a 7-digit subscriber number after the +676 country code, with no separate area code. Since there's no prefix layer to account for, the full dial string is always the same length for every number in the country.
Yes — since Tonga runs on Pacific/Tongatapu, calls can be routed to the right team based on local business hours there. That's especially useful for support or sales teams covering multiple countries across different time zones from one platform.
Over Tier-1 direct interconnects with major local networks like Tonga Communications Corporation (TCC), rather than lower-quality wholesale transit routes. That direct-carrier approach is what keeps delivery rates and call clarity high.
Tonga Communications Commission (TCC) is the regulator for Tonga. Twiching routes calls in line with its rules for compliant, licensed termination, rather than relying on unlicensed grey routes that can be blocked or degraded.
Tonga's ISO 3166-1 alpha-2 code is TO, distinct from its dialing code (+676). The ISO code is used in things like domain names and shipping forms, while the dialing code is what actually routes a phone call.
Full country code directory
Oceania is fully covered in Twiching's 191-country directory. Jump to any of the markets below for the same level of detail shown on this Tonga page. All 190 other countries are listed below, Oceania first.
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