EnglishKnow the carrier before you send
Identify which carrier a phone number belongs to, so you can route, clean and plan your messaging with confidence.
Check how a number looks
Many bad sends begin with a number that was never well-formed. Paste one to see how it breaks down, following the E.164 standard.
- Country
- United States / Canada
- Country code
- +1
- National number
- 415 555 012 3
- Standard format
- +14155550123
This checks the shape only. To see the carrier behind a number, use the lookup.
Open the free lookup →Remove landlines and invalid numbers
Landlines usually cannot receive SMS. Checking line type before a campaign stops you paying for messages that cannot be delivered. Send the rest with the SMS API.
+44 7911 123456Can receive SMSMobile+44 20 7946 0123Usually cannot receive SMSLandline+91 98765 43210Can receive SMSMobile+91 98765Not a valid numberInvalid+1 415 555 0123Runs over the internet. Review it.VoIP+61 412 345 678Can receive SMSMobile+999 123456789Not a valid numberInvalid+49 30 123456Usually cannot receive SMSLandline
Press “Clean list” to set landlines and invalid numbers aside.
Know your audience before you launch
Understand which carriers your audience is on before you plan a bulk SMS campaign.
Network A carries 38% of this list, about 3,800 numbers.
The network shown is the one a number range was first assigned to. If the owner has since moved to another operator, the current carrier can differ. For US and Canada numbers the carrier is not shown.
One check, four teams
Marketing, product, operations and engineering all start from the same clean list.
Plan campaigns by network
See which carriers your audience is on before you launch, so you plan around your list instead of guessing.
- Know the network mix of a list
- Spot numbers that will not work before you pay to send
- Segment by network when it matters
Look up a number in seconds
- 1
Enter a number
Type any phone number into the free lookup, no account needed.
- 2
Get the carrier
See which carrier the number belongs to.
- 3
Go further
Need thousands of lookups or an automated check? Contact the team about bulk options.
How a phone number is written
Every number has the same parts. Writing them in the standard way makes a number easy to check, store and send to.
At most 15 digits in total, with no spaces or dashes once stored.
Add the country code. Drop the brackets and dashes.
In the UK, swap the leading 0 for +44.
Remove dashes and spaces. Keep the +.
Replace the 00 dial-out prefix with +.
Individual lookups are free
For high-volume or automated lookups, tell us your volume and we will set up bulk options.
Number Lookup — frequently asked questions
Individual lookups on the carrier lookup page are free and need no account. For high-volume or automated lookups, contact the SMSLocal team about bulk options.
Knowing the carrier helps you clean lists, plan campaigns by network and avoid wasted sends.
Whether the number is valid, its line type (mobile, landline or VoIP), the network it was issued by, its region and its time zone.
Numbers from every country can be validated and given a line type. Carrier names are available for most countries. For the US and Canada the carrier is not shown, because numbers there move freely between operators.
Not always. The lookup shows the network the number range was originally assigned to. If the owner has ported the number to another operator since, the current carrier can differ. Validity and line type are reliable.
Portability lets people keep their phone number when they switch operators. It is why the original network of a number is not always the one serving it today.
The free tool checks one number at a time. For bulk or API-based lookups, contact the SMSLocal team and tell us your volume.
Need lookups at scale?
Tell us your volume and we will set up bulk or automated lookups.