Tanzania phone number format
Tanzania phone numbers use the country code +255. A mobile number looks like 0621 234 567 inside Tanzania and +255 621 234 567 from abroad: the leading 0 is dropped after +255. Mobiles have 9 digits after the country code, and the E.164 form is +255621234567.
Tanzania number format at a glance
| Country calling code | +255 |
|---|---|
| International prefix (calling out of Tanzania) | More than one; + works from any mobile |
| Trunk prefix (domestic dialling) | 0 |
| Mobile number length | 9 digits after +255 |
| Landline number length | 9 digits after +255 |
| Mobile vs landline from the digits | Yes, separate ranges |
Example Tanzania phone numbers
These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.
| Format | Mobile | Landline |
|---|---|---|
| National (inside Tanzania) | 0621 234 567 | 022 234 5678 |
| International | +255 621 234 567 | +255 22 234 5678 |
| E.164 | +255621234567 | +255222345678 |
How to write a Tanzania number in E.164
- Remove spaces, dashes, dots and brackets so only digits are left.
- If the number starts with the trunk prefix 0, remove it. It is only used when dialling inside Tanzania.
- Put +255 in front. The result has 9 digits after the country code for a mobile.
So 0621 234 567 becomes +255621234567. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.
Mobile or landline?
Tanzania allocates separate number ranges to mobiles and landlines, so a numbering-plan check reads the line type straight from the digits, for free. That type describes the range the number came from. It doesn’t prove the number is connected today.
Validate a list of Tanzania numbers
Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Email + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.
Common questions
- What is the country code for Tanzania?
- The country calling code for Tanzania is +255. When you call Tanzania from abroad, dial your international prefix (or +) followed by 255 and the number without its leading 0.
- How many digits is a Tanzania phone number?
- A Tanzania mobile number has 9 digits after the country code +255, the same as a landline. Written for dialling inside Tanzania, a number gains the trunk prefix 0 in front.
- How do I write a Tanzania number in international format?
- Start with +255, drop the leading 0, then add the rest of the number. The mobile number 0621 234 567 becomes +255 621 234 567, or +255621234567 in E.164, the form most CRMs and SMS tools expect.
- Can you tell if a Tanzania number is a mobile?
- Usually, yes. Tanzania numbers come from ranges allocated separately to mobiles and landlines, so a numbering-plan check reads the line type from the digits. It tells you what the range is for, not whether the number is in service.
That was one number. Your CRM export has thousands.
This tool checks one number at a time. Cleaning a list means every row in E.164, invalid numbers separated out, and the emails beside them checked too.
- Upload a CSV up to 100,000 rows with an email or phone column
- Every phone gets status, E.164 format, country and line type
- Emails in the same file get a real SMTP mailbox check
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