TSSRegistry API: Is there a TSSRegistry API for Service Registrars? March 27, 2026 12:12 Updated Yes, an API is available that can help automate the provisioning process. Click here for more details. Related articles TSSRegistry API: Is there a TSSRegistry API for Toll-Free Service Providers (Resp Orgs)? TFNRegistry UI: How do I Update the URC Page? When were 800, 888, 877, 866, 855, 844, and 833 TFNs made available for use? TFNRegistry: As a Resp Org, How do I Find the Controlling Resp Org of a TFN? TFNRegistry: How do I Apply to Manage my Carrier in the TFNRegistry?