Is a Level 3 phone number VOIP?
ApplySift reads it as: VOIP wholesalerYes. Level 3 is a carrier whose numbers are provisioned by software to VOIP platforms and apps, not sold as phone lines to people. When a reverse lookup on an applicant's number says LEVEL 3 COMMUNICATIONS, LLC - CA, this is what it means.
What Level 3 is
Level 3 Communications is part of Lumen Technologies, which bought it in 2017 along with the CenturyLink brand. Level 3's local-carrier entities in each state carry wholesale voice: many VOIP providers, call centres and unified-communications products route through Level 3 and hand out numbers from its blocks. Level 3 also serves large businesses directly, so some of its numbers ring on real office desks.
By the numbers
Every North American number belongs to a block of a thousand, and every assigned block is listed with its holder in NANPA's public thousands-block report. Some holders are also assigned whole exchanges of ten thousand numbers in the central-office code report. These counts are from the October 2026 reports. The area codes with the most Level 3 blocks are 646, 512, 678, 469, 832, 484, which says more about where numbers are in demand than about where the applicant lives: a number from a wholesaler is picked from whatever area code the buyer asked for.
How it appears in a lookup
The record lists the legal entity that holds the block, often with a state suffix. Level 3 appears under these names, most common first:
- LEVEL 3 COMMUNICATIONS, LLC - CA (6,180)
- LEVEL 3 COMMUNICATIONS, LLC - TX (4,246)
- LEVEL 3 COMMUNICATIONS, LLC - NY (3,139)
- LEVEL 3 COMMUNICATIONS, LLC - FL (2,879)
- LEVEL 3 COMMUNICATIONS, LLC - IL (2,553)
- LEVEL 3 COMMUNICATIONS, LLC - PA (2,436)
- LEVEL 3 COMMUNICATIONS, LLC - OH (1,903)
- LEVEL 3 COMMUNICATIONS, LLC - MI (1,612)
Why an applicant's number lands here
A Level 3 number is less specific than one from a pure API carrier. It can be a corporate desk phone, a call-centre line or a number a VOIP app assigned a minute ago. ApplySift still counts it as a wholesaler block because the applicant pool it was validated on agreed with a paid line-type lookup almost perfectly, but weight it with the other signals on the row.
In one real pool of 1,455 applications to a remote engineering role, 60% of the phone numbers were in wholesaler blocks like these; a paid line-type lookup agreed with the public-record check on 99% of them. Why fraud rings use VOIP numbers explains the pattern, and the signals page gives the weight this reason carries in a score.
What this does not tell you
- Ported numbers. A number moved from one carrier to another keeps its original block in the public record. A real mobile number ported to a VOIP app still reads as the mobile carrier, and a Level 3 number ported to a mobile carrier still reads as Level 3. Porting data is not public, so no free lookup can see it.
- Who the person is. The record names the carrier, never the subscriber. ApplySift uses the block holder as one signal among several and never rejects anyone on its own.
Check a number
| Block | |
|---|---|
| Assigned to | |
| Found at |
Free, no account, and the number is not stored. The same lookup as the number lookup page.
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