YMax Communications is the phone company behind magicJack, an internet phone service.
YMax Communications Corp. is the phone company behind magicJack, an internet phone service that connects a regular phone to the internet or runs as an app. A magicJack number shows YMax on a lookup because YMax holds the number on the phone network. NANPA, which runs the North American numbering plan, lists YMax as the holder of 90 prefixes in 20 states and territories, less than 1% of the 198,436 prefixes it has assigned.
- Name in NANPA's file
- YMAX COMMUNICATIONS CORP. - NY, and 19 other listings
- What it is
- Internet phone service
- Prefixes held
- 90 of 198,436 (less than 1%)
- States and territories
- 20 of 56, most in New York, Pennsylvania and Virginia
- Area codes
- 55
- Pooled prefixes
- 100%, shared in blocks of 1,000 numbers
From NANPA's central office code file of October 1, 2026. A prefix is the three digits after the area code.
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A lookup shows YMax when the number is a magicJack line.
magicJack customers get their phone number from YMax, so a lookup names YMax, the company that holds the number, rather than the magicJack brand.
Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a YMax prefix can show another company if it was ported.
YMax holds the most prefixes in New York: 22 of its 90.
- New York22
- Pennsylvania11
- Virginia10
- New Jersey9
- Florida5
- Massachusetts5
- Maryland5
- Indiana4
Plus 19 prefixes in 12 more states and territories.
YMax holds prefixes in 55 area codes, and these are its largest.
Of the prefixes NANPA dates, YMax received the most in 2008: 26.
NANPA's file gives an assignment date for 80 of YMax's 90 prefixes, all from 2001 on. The rest have no date in the file.
A call from a YMax number is not spam just because of the carrier.
Numbers from wholesale carriers like YMax are used by ordinary people on calling apps and by real businesses. They are also cheap and quick to get, so some robocallers use them too.
The carrier name alone does not make a call safe or spam: judge it by what the caller asks for, and be careful with anyone who asks for money, codes or passwords.
Check the full number with our free spam phone checker before you call back.
You can read about 5 more carrier names here.
- Onvoy Spectrum, LLCSupplies numbers to VoIP and app-based phone services, 1,770 prefixes
- HD Carrier, LLCNumber holder with no public description, 329 prefixes
- NUSO, LLCCloud phone and wholesale number carrier, 739 prefixes
- Peerless NetworkWholesale phone carrier, 1,265 prefixes
- Bandwidth.com CLEC, LLCSupplies numbers to VoIP and app-based phone services, 4,804 prefixes
These are the questions people ask about YMax.
What is YMax Communications Corp.?
YMax Communications Corp. is the phone company behind magicJack, an internet phone service that connects a regular phone to the internet or runs as an app. A magicJack number shows YMax on a lookup because YMax holds the number on the phone network.
Why does a phone lookup say YMax?
A lookup shows YMax when the number is a magicJack line. magicJack customers get their phone number from YMax, so a lookup names YMax, the company that holds the number, rather than the magicJack brand. Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a YMax prefix can show another company if it was ported.
Is a call from a YMax number spam?
Numbers from wholesale carriers like YMax are used by ordinary people on calling apps and by real businesses. They are also cheap and quick to get, so some robocallers use them too. The carrier name alone does not make a call safe or spam: judge it by what the caller asks for, and be careful with anyone who asks for money, codes or passwords. Check the full number with our free spam phone checker before you call back.
How many phone prefixes does YMax hold?
NANPA lists YMax as the holder of 90 prefixes, less than 1% of all assigned US prefixes. A prefix is the three digits after the area code and covers up to 10,000 numbers. 100% of these are pooled, so blocks of 1,000 numbers inside them can belong to other carriers.
Which states have the most YMax prefixes?
New York (22), Pennsylvania (11) and Virginia (10) have the most, out of 20 states and territories.
Can I find out who owns a YMax number?
YMax does not publish who uses its numbers. Our free who called me lookup shows who a US number is listed to and the city and state on the listing, when the number has a listing.
Source: NANPA, the North American Numbering Plan Administrator: its central office code assignments, as of October 1, 2026. Company histories are from public records and each company's own descriptions.