Value,Name,Reference 0-299,Reserved, 300,Try Alternate,[RFC8489] 301-399,Unassigned, 400,Bad Request,[RFC8489] 401,Unauthenticated,[RFC8489] 402,Unassigned, 403,Forbidden,[RFC8656] 404,Unassigned, 405,Mobility Forbidden,[RFC8016] 406-419,Unassigned, 420,Unknown Attribute,[RFC8489] 421-436,Unassigned, 437,Allocation Mismatch,[RFC8656] 438,Stale Nonce,[RFC8489] 439,Unassigned, 440,Address Family not Supported,[RFC8656] 441,Wrong Credentials,[RFC8656] 442,Unsupported Transport Protocol,[RFC8656] 443,Peer Address Family Mismatch,[RFC8656] 444-445,Unassigned, 446,Connection Already Exists,[RFC6062] 447,Connection Timeout or Failure,[RFC6062] 448-485,Unassigned, 486,Allocation Quota Reached,[RFC8656] 487,Role Conflict,[RFC8445] 488-499,Unassigned, 500,Server Error,[RFC8489] 501-507,Unassigned, 508,Insufficient Capacity,[RFC8656] 509-699,Unassigned,