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DID numbers · AT +43

Austria DID Numbers for inbound and CLI

Local numbers in Austria that ring your SIP endpoint and double as verified outbound caller IDs. Order, document and route them from the portal.

Europe+43
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key_facts · at
country_code
+43 · AT
national_len
Variable: 4–13 digits after the trunk 0
mobile
0650–0699, e.g. 0660, 0664, 0676, 0699
fixed
01 Vienna · 0316 Graz · 0662 Salzburg
regulator
RTR (Rundfunk und Telekom Regulierungs-GmbH) and the Telecom-Control-Kommission
timezone
CET (UTC+1), CEST (UTC+2) in summer.
reviewed
2026-10-05

Overview

DID numbers to Austria

A DID (direct inward dialing) number gives you a real Austria number on your SIP trunk. It receives calls from local customers and, because you hold it, it is also the strongest caller ID you can present on outbound traffic to Austria.

Austrian geographic numbers in Vienna and the regional capitals are available with proof of a local address.

Austria shares a language with Germany but has its own regulator, numbering plan and an even stricter consent regime for consumer calls. Traffic is mostly customer care, utilities and B2B.

Number formats
TypeE.164
Mobile+43 664 123 45670664 1234567
Fixed+43 1 234 567801 2345678

+43 followed by an area code of 1–4 digits and a subscriber number of variable length.

Regulation · RTR

Caller ID rules in Austria

A practical summary for operations teams, not legal advice. Confirm current requirements with counsel before you launch.

Last reviewed

Caller-ID presentation

Suppressing or falsifying the CLI on advertising calls is an administrative offence under the TKG 2021. Consumer advertising calls require prior, documented consent, and the Robinson list maintained by the Chamber of Commerce is a further opt-out.

Consent for consumer calls (TKG 2021 §174)

Calls for advertising purposes to consumers require prior consent. Consent must be specific and documented; a business relationship alone is not enough.

Number presentation

Suppressing or falsifying the CLI on advertising calls is an administrative offence with significant fines.

Robinson list

The Robinson list maintained by the Chamber of Commerce is a further opt-out that direct marketers are expected to respect.

Calling hours

No statutory window; consent is the binding constraint. Keep to weekday business hours.

Dialing & setup

Dialing Austria correctly

  • Drop the trunk 0: 01 2345678 becomes +43 1 2345678.
  • Austria uses fully variable-length numbering, from very short Vienna extensions to long rural numbers. Never apply a fixed-length check.
  • Austrian German differs from German German in vocabulary; local scripts perform better.
  • Keep consent records specific to Austria, separate from German campaigns.

Caller ID best practice

Present an Austrian number you hold and never suppress the number on marketing calls. Vienna numbers (+43 1) are the most widely recognised.

Troubleshooting

Common SIP errors on Austria calls

  • 484

    Address Incomplete

    A number was truncated by a fixed-length validator.

  • 403

    Forbidden

    The CLI is invalid or not assigned to you.

  • 404

    Not Found

    The trunk 0 was kept after +43, or the number is out of service.

Quality guidance

What healthy Austria traffic looks like

Austrian routes are stable. Variable number length is the most common cause of failed calls, not route quality.

38–55%

ASR

2.5–4min

ACD

2–4s

PDD

Typical ranges on healthy routes, as guidance only. Results depend on your lists, CLI reputation and campaign type. Live per-destination stats are in your portal.

Setup

Connect your DID number for Austria

Replace the placeholders in angle brackets with the values from your portal. Full trunk templates for each platform are in the portal after sign-up.

Asterisk inbound route+43
; extensions.conf — inbound Austria DID from CLIRoutes
[from-clirroutes]
exten => +4312345678,1,NoOp(Inbound Austria DID)
 same => n,Set(CALLERID(name)=AT support line)
 same => n,Goto(ivr-main,s,1)

; Present the same DID on outbound Austria calls once it is verified.

FAQ

Austria DID numbers: FAQ

Can’t find what you need? Our routing team answers within the hour, around the clock.

Can I reuse my German campaign for Austria?

Not as-is. Austria needs its own consent records, an Austrian CLI and an Austrian number list. German UWG consent does not automatically carry over.

Why are Austrian numbers different lengths?

Austria uses variable-length numbering. Vienna (+43 1) numbers can be short, while rural numbers have longer area codes. Do not pad or truncate in your dialer.

Is a Vienna number better than a mobile CLI?

For business calls, usually yes. A +43 1 Vienna number is widely recognised and signals an established business, while an unknown mobile is often ignored.

What is the Austrian Robinson list?

An opt-out list maintained by the Austrian Chamber of Commerce. Consent is the legal requirement for consumer calls, but direct marketers are expected to respect the list too.

What happens if I call without consent?

Unsolicited advertising calls are administrative offences with substantial fines per call, and the regulator acts on consumer complaints.

What documents do I need for Austria DIDs?

It depends on the number type. Many geographic numbers in Austria require proof of a local address or business registration; toll-free and non-geographic numbers usually need less. The portal lists requirements per number type before you order.

Other products in Austria

Nearby countries

Related guides

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