What is a ddi phone number? A DDI is generally a phone number which incorporate that extension number Typically, it is the last three digits of a phone number which changes per extension. For instance, if an extension number, internally is 551, the phone number would look something like this: 01536 211551.How do i contact dci customer service? Reach us by email any time at [email protected]. We'll do our best to respond as quickly as possible.How do i contact dmdc customer service? Support Contact Information. Support Contact Information. If you need help with the IDCO application, contact the DMDC Support Center (DSC) help desk. Customer Service Representatives are available 24x7 at: Worldwide: 1-800-477-8227. CONUS – DSN: 878-2856. OCONUS – DSN: 312-878-2856.Where can i find a list of sdi office locations? For a list of office locations, visit State Disability Insurance (SDI) Office Locations. Contact us by phone using our Statewide Toll-Free Numbers or our automated phone systems: For technical help with Benefit Programs Online registration, contact the EDD to speak to a representative by calling:
Answer (1 of 4): There is not necessarily a DID for a toll free number. Any local business or even a residence can get a toll free number. In which case there is a DID. However most toll free numbers are connected to larger organizations that use a ...