Phone carriers · Bandwidth
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What Is Bandwidth.com CLEC, LLC?
Bandwidth at a glance
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CLEC stands for competitive local exchange carrier. Bandwidth defines CLECs as "local voice service carriers that are authorized to interconnect their local network with the Public Switched Telephone Network (PSTN)" (Bandwidth glossary, read 14 November 2026). Bandwidth blocks hold 79.2 million US numbers under 49 OCNs, one for each of 49 regions, and Trueguard returns them as line.type voip, line.voipType nonFixed and line.carrierType cpaasVirtual. Bandwidth's FY2025 10-K says it powers UCaaS and CCaaS leaders "including Microsoft, Google, Zoom, Cisco, RingCentral, Genesys, and Five9".
Published by Trueguard. Facts about Bandwidth read 14 November 2026.
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What Trueguard returns for a number in a Bandwidth block
| Field | Value | Why |
|---|---|---|
line.type | voip (VoIP) | A number served over the internet. |
line.voipType | nonFixed (Non-fixed VoIP) | A number obtained online without a physical line. |
line.carrierType | cpaasVirtual (Virtual number provider (CPaaS)) | Served from a communications platform. |
line.smsCapable | true | Trueguard marks non-fixed VoIP numbers SMS capable. |
line.originalCarrier | Bandwidth | The holder of the number block. A number in a Bandwidth block reads Bandwidth. |
line.currentCarrier | Bandwidth | Bandwidth when the number is not ported. For a US number that was ported, the carrier it moved to. |
risk.status | safe | Safe unless the number is disposable or premium rate. |
Example: +1 408 634 3220
Example data from a real check of this number.
Risky
+1 408 634 3220
This number is valid, but it carries risk.
Listed on a public SMS-receiving site in the last 30 days.
- Carrier type
- Virtual number provider (CPaaS)
- Line type
- VoIP
- VoIP type
- Non-fixed VoIP
- 1
Bandwidth holds the range and serves the number
The original and current carrier both read Bandwidth, and the ported flag is No.
- 2
Listed on a receive-SMS site
Trueguard saw this number on a public receive-SMS site within the last 30 days. risk.isDisposable is true, so risk.status is risky.
- 3
The rule is block
A non-fixed VoIP number that is disposable gets a block in the Trueguard signup rule.
Bandwidth in Trueguard's data
Bandwidth blocks hold 4.2% of US numbers and 26.5% of the disposable numbers Trueguard saw in US blocks, about 6.3 times its share.
| Carrier | Numbers in blocks held | Share of US numbers | Area codes | Trueguard line type | Share of disposable numbers |
|---|---|---|---|---|---|
| Onvoy | 219,574,000 | 11.7% | 364 | Non-fixed VoIP | 36.4% |
| Bandwidth | 79,220,000 | 4.2% | 358 | Non-fixed VoIP | 26.5% |
| Telnyx | 13,067,000 | 0.70% | 338 | Non-fixed VoIP | 18.2% |
| Twilio | 342,000 | 0.018% | 188 | Non-fixed VoIP | 3 seen, too few to share |
Trueguard data, 14 November 2026: disposable numbers in US blocks, grouped by the carrier that holds the number block. Disposable here means a number listed on a public receive-SMS site that Trueguard monitors, in the last 180 days. Base: 11,314 disposable numbers in US blocks. Block sizes from NANPA data.
Get your free API keyAbout Bandwidth
Who Bandwidth is
Bandwidth was founded in 1999 by David Morken, its current CEO, as a business-grade internet reseller. The company is headquartered in Raleigh, NC.
Source: Bandwidth company page, read 14 November 2026.
Bandwidth.com CLEC, LLC is a wholly owned subsidiary of Bandwidth Inc.
Source: Bandwidth pricing page footer, read 14 November 2026.
Bandwidth says its network gives it "command over our own numbering resources", which enables "real-time porting, provisioning and number ordering en masse".
Source: Bandwidth Inc. 10-K for FY2025 (SEC), read 14 November 2026.
Through its Global Voice Plans offering, Bandwidth says it powers "all the leaders in UCaaS and CCaaS, as recognized by the research firm Gartner, including Microsoft, Google, Zoom, Cisco, RingCentral, Genesys, and Five9".
Source: Bandwidth Inc. 10-K for FY2025 (SEC), read 14 November 2026.
Bandwidth says it generally completes "considerable 'know-your-customer' reviews" before a customer can use its platform, and that it cannot always audit customers afterwards.
Source: Bandwidth Inc. 10-K for FY2025 (SEC), read 14 November 2026.
Why a Bandwidth number calls or texts you
Apps, contact centers and business phone systems get numbers from Bandwidth through its API, so a call or text from one of its numbers can come from any of them. The carrier name shows who holds the number block.
A Bandwidth number can also be used for a one-off signup. 26.5% of the disposable numbers Trueguard saw in US blocks sit in Bandwidth blocks, against 4.2% of US numbers held. Judge the message or the signup.
Can you find out who owns it?
Trueguard shows the carrier and line type, not the owner. The platform that holds the number keeps the account details, and Trueguard does not do reverse phone lookup or caller names.
If a call or text bothers you, block the number on your phone, report the message to your own mobile carrier, and report abuse to the platform that holds the number.
Detect Bandwidth numbers at signup
Trueguard returns a number in a Bandwidth block as non-fixed VoIP, so the rule is to step up. A non-fixed number with receive-SMS history is blocked.
| The rule for numbers on Bandwidth | Action |
|---|---|
line.type mobile, risk.status safe | Allow |
line.voipType fixed | Allow. line.smsCapable is false, so verify by another channel such as email. |
line.voipType nonFixed, no disposable history | Step up |
line.voipType unknown | Step up |
Any line with risk.previouslyDisposable true | Step up |
line.voipType nonFixed and risk.isDisposable true | Block |
line.voipType nonFixed and risk.previouslyDisposable true | Block |
Any line with risk.status risky (disposable or premium rate) | Block |
risk.status invalid | Reject and ask the user to re-enter |
Check for Bandwidth numbers from your code
The same data comes from POST /v2/phone/validation, one number per request. 100 checks a month are free with no card. The Standard plan is $49.99 a month for 20,000 checks, then $0.0025 a check. Median response is under 500 ms.
curl -X POST https://api.trueguard.io/v2/phone/validation \
-H "X-API-KEY: $YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"phone":"+14159929960"}'Questions about Bandwidth numbers.
Anything missing? Contact support or read the documentation.
What is Bandwidth.com CLEC, LLC?
It is the carrier subsidiary of Bandwidth Inc. Check a number with Trueguard: line.originalCarrier reads Bandwidth when Bandwidth holds the number block. 5 checks a day are free here, and 100 a month with a free API key.
Why does my lookup say Bandwidth.com CLEC?
The number sits in a block that Bandwidth.com CLEC, LLC holds, or the number was ported to Bandwidth. The app or business using the number gets it from Bandwidth, so the lookup names the carrier and not the sender.
Is Bandwidth.com a scam?
A carrier is not a scam by itself. Bandwidth Inc. was founded in 1999 and is public (company page and FY2025 10-K, read 14 November 2026). Its 10-K says it generally completes "considerable 'know-your-customer' reviews" before a customer can use its platform. Any number can still be misused, so judge the message.
Is Bandwidth.com CLEC a cell phone?
Trueguard returns VoIP for numbers in Bandwidth blocks, not mobile, and marks them SMS capable.
Is a Bandwidth number VoIP?
Yes, non-fixed VoIP. If a US number was ported, line.currentCarrier shows the new carrier and line.originalCarrier still shows Bandwidth.
How do I stop calls from Bandwidth.com numbers?
Block the number on your phone, report the message to your own mobile carrier, and report abuse to the platform that holds the number. Blocking one number does not stop a sender who rents another.
Can I find out who owns a Bandwidth number?
Not with a carrier lookup. Trueguard returns carrier and line type, not the owner. The account details sit with the platform that holds the number, so report abuse to Bandwidth or the app that sent the message.
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