The toll-free industry, visible.
Look up any toll-free number's 4-year ownership history, or research the companies that control them.
Enter a toll-free number for its history, or a company name for its profile.
What is a RespOrg?
A RespOrg — short for Responsible Organization — is the entity registered with Somos, the national toll-free number registry, that manages a specific toll-free number. Every active 800/833/844/855/866/877/888 number in North America is controlled by exactly one RespOrg at any given time.
RespOrgs sit between Somos and the phone carriers. Some are carriers themselves (AT&T, Verizon, Twilio, Bandwidth). Others are resellers, aggregators, or specialists who make their money by reserving, brokering, and sometimes harvesting valuable numbers out of the disconnect pool. There are about 480 active RespOrgs today, and this site makes every one of them visible — their scale, behavior, and how numbers flow between them.
Top 20 RespOrgs by active numbers
These are the giants. Together the top 20 control most of the industry's 48,461,381 active toll-free numbers. Click any card for their 4-year trajectory, vanity holdings, and inbound/outbound flows.
Categories of phone companies
We sort every RespOrg into one of 18 categories based on the type of business they operate. The makeup of the industry is uneven: a few large telecoms and messaging platforms dominate the active inventory, while dozens of smaller RespOrgs fit into more specialized roles — from vanity brokers and voicemail services to a growing group of misdial marketers whose business is essentially to wait for well-known numbers to drop into the disconnect pool.
Top 10 groups
Many RespOrgs aren't really separate companies — they're shell codes operated by the same organization, often to blur their true footprint. A group is our published mapping of those relationships: either confirmed via contact information we've gathered over 20+ years in this industry, or inferred from behavioral fingerprints in the monthly number-flow data. Primetel, for example, operates under 18 different RespOrg codes; combined they hold more toll-free numbers than AT&T.
| # | Group | RespOrgs | Combined active numbers | Opp.Idx |
|---|---|---|---|---|
| 1 | Primetel Primetel 1-800 Numbers |
18 | 5,751,252 | 13.56% |
| 2 | Verizon Verizon 800 Numbers |
9 | 4,848,368 | 2.00% |
| 3 | Inteliquent Inteliquent 800 Numbers |
6 | 2,363,031 | 0.97% |
| 4 | AT&T AT&T is one of the Largest Resporgs. |
11 | 2,275,503 | 0.84% |
| 5 | Lumen Formerly Century Link now called Lumen, 800 numbers, or Qwest 1-800 Numbers |
11 | 1,051,616 | 0.41% |
| 6 | ATLC ATLC 800 Numbers ATL 800 Services |
8 | 729,437 | 14.44% |
| 7 | Amazon Amazon is a resporg, and they actually they have TWO resporgs, but with a total of 27 numbers they fall into the insigni… |
2 | 598,303 | 0.33% |
| 8 | Kall8 Kall8 1-800 Numbers |
5 | 555,737 | 0.28% |
| 9 | Flotrax Flotrax is in the Misdial Marketing business and has a lot of Great 800 Numbers |
7 | 490,227 | 31.19% |
| 10 | Nice Nice |
2 | 266,063 | 0.70% |
Common questions
How do I find out which RespOrg controls my toll-free number?
Use the number lookup at the top of this page — enter the number in any format and we'll show the current RespOrg plus its full 4-year ownership history.
I used to own a number and now it's getting scammy calls. What happened?
When you disconnected the number, it went into an aging pool for 45–90 days. After aging it was released back to Somos's spare pool — where any RespOrg could claim it. Sharks specifically target recognizable numbers the moment they become available. We track exactly which RespOrgs do this (see our Opportunism Index).
Can I switch my toll-free number to a different RespOrg?
Yes — as long as you actually own it. Any RespOrg is required to release numbers you own on request. If they won't respond, Somos has a dispute process, and we can point you in the right direction — use Ask a question from any RespOrg's profile.
Why do some RespOrgs have so many numbers?
The industry is dominated by a handful of wholesale carriers (Twilio, Bandwidth, Verizon, AT&T) that each hold millions of numbers serving thousands of customers. On the other end are single-purpose RespOrgs with only a handful of numbers, often for a single company's own use.
Are there sharks in this industry?
Yes, and this site names them. Our Opportunism Index measures how much of a RespOrg's new inventory comes from numbers that were just disconnected by somebody else. Values above 20% indicate harvesting as a primary business model.