Fresno, California
Area code 559 phone validation
Calling or texting a list of 559 numbers? Check every number first: valid or dead, mobile, landline or VoIP, and the carrier it is on now.
Start 7-day free trial →What validating 559 numbers tells you
- ✓Valid or dead. Disconnected and unassigned 559 numbers are flagged before your dialer or SMS tool reaches them.
- ✓Mobile, landline or VoIP. Know which numbers can take a text and which are desk phones or app numbers.
- ✓Carrier. The carrier each number is on now, which can differ from the company that was first given the prefix because numbers are ported.
Who holds 559 prefixes
Companies holding the most 559 prefixes (NPA-NXX blocks) in the NANPA utilized-codes report. This is who was assigned the number blocks, not who serves each number today: a number can be ported to any carrier, which is why a live check matters.
| Pacific Bell | 182 prefixes |
| New Cingular Wireless Pcs | 123 prefixes |
| T-Mobile Usa | 56 prefixes |
| Onvoy | 56 prefixes |
| Verizon Wireless | 52 prefixes |
| Level 3 Communications | 44 prefixes |
201 of 785 559 prefixes are held by companies that commonly supply numbers to VoIP and texting apps.
Places served by 559
Fresno, Visalia, Clovis, Madera, Hanford, Portervl, Tulare, Lemoore.
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Questions
Where is area code 559?
559 serves Fresno, California, including places such as Visalia, Clovis, Madera. Time zone: Pacific Time (PT).
Does a 559 number mean the person is in California?
Not always. People keep their numbers when they move or switch carriers, and VoIP numbers can be assigned anywhere. The area code tells you where the number was first assigned, not where the person is today.
What does validating a 559 number tell me?
Whether the number is valid or dead, whether it is a mobile, landline or VoIP line, and the carrier it is on now, from live carrier data.
Does TrueSearch check Do Not Call lists?
No. TrueSearch does not check the National Do Not Call Registry, state DNC lists or litigator lists yet. Run those checks separately where they apply.
559 prefix pages
More California area codes
Area code 559 reference: places, prefixes and local time
This guide is general information, not legal advice. TrueSearch for Business checks validity, line type and carrier from licensed telecom data. It does not check the National Do Not Call Registry, state DNC lists or the FCC Reassigned Numbers Database. Not a consumer reporting agency; not for FCRA purposes.