"3-2-1, Call Cape Canaveral". The New York Times. November 23, 1999. Section F, page 6. Retrieved March 2, 2011. https://www.nytimes.com/1999/11/23/science/3-2-1-call-cape-canaveral.html
Mehta, Stephanie N. (February 26, 1999). "The Kennedy Space Center Acquires A New Area Code: 3-2-1, as in Blast Off". The Wall Street Journal. https://www.wsj.com/articles/SB91992421914317000
"Phone phreaking, DMCA and Hacking. An interview with Cheshire Catalyst July 2000" on YouTube https://www.youtube.com/watch?v=zQwlNZ2exDU&t=31m9s
"About Us". Satcom Direct. All such calls go through the service's Melbourne data center. (The company headquarters are in Melbourne.) https://satcomdirect.com/
"Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). NANPA. January 8, 2021. Retrieved March 9, 2021. https://nationalnanpa.com/pdf/PL_556.pdf