See also: SPN Translingual Symbol spn (international standards) ISO 639-3 language code for Sanapaná. See also Wiktionary’s coverage of Sanapaná terms English Noun spn (plural spns) (cryptography) Initialism of substitution-permutation network. Anagrams PNS, SNP, PSN, PNs, NPs, NPSWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads