DNS Example

DNS Error

Study a DNS error response with NXDOMAIN status. Understand response code fields, error flags, and how DNS indicates a non-existent domain.

Hex Data

81 83 00 01 00 00 00 00 00 00 07 6E 6F 6E 65 78 69 73 74 03 63 6F 6D 00 00 01 00 01
Note: Response code = 0x8183 (NXDOMAIN - domain does not exist)
Load in Visualizer
errornxdomain

Field Breakdown

Transaction ID
Identifier for matching queries and responses
0x8183
Flags
Query/Response flags and codes
0b0000000000000001
Questions
Number of questions
0
Answer RRs
Number of answer resource records
0
Authority RRs
Number of authority resource records
0
Additional RRs
Number of additional resource records
1902

Related Resources

DNS Protocol Visualizer - Parse & Analyze DNS MessagesDNS Message Format Explained - ByteLensDNS Query Packet Example - ByteLensDNS Response Packet Example - ByteLensDNS MX Record Query Example - ByteLensDNS over UDP Transport Example - ByteLens

About DNS

Domain Name System (RFC 1035)

Fields: 6
Endianness: big
Specification: RFC 1035