TELEPHONE AND DSN INSTRUCTIONS
The Colorado Springs and vicinity area code is 719. Peterson’s DSN prefix is 692 for numbers with a 554 commercial prefix. For numbers with a 556 prefix, the DSN prefix is 834. Schriever’s DSN prefix is 560. To reach Schriever from a commercial line, use a 567 prefix. Cheyenne Mountain’s DSN prefix is 268. To reach Cheyenne Mountain from a commercial line, use a 474 prefix.
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