OID value: 1.2.840.10045.3.1.7
OID description:
Covers "secp256r1", the elliptic curve domain listed in "SEC 2: Recommended Elliptic Curve Domain Parameters". The SEC (Standards for Efficient Cryptography) curves provide elliptic curve domain parameters at commonly required security levels for use by implementers of ECC standards like ANSI X9.62, ANSI X9.63, IEEE P1363, and other standards.
URL for further info: http://www.secg.org/collateral/sec2_final.pdf
See also the OID Repository website reference for 1.2.840.10045.3.1.7