3.A類網絡
*互聯網地址網絡參考
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*0.rrr.rrr.rrrReserved[JBP]
1.rrr.rrr.rrr-2.rrr.rrr.rrrUnassigned[NIC]
C*3.rrr.rrr.rrrGE-INTERNET[JEB50]
R4.rrr.rrr.rrrSATNET[SHB]
5.rrr.rrr.rrrUnassigned[NIC]
D6.rrr.rrr.rrrYPG-NET[BWA]
D7.rrr.rrr.rrrEDN-TEMP[EC5]
R8.rrr.rrr.rrrBBNCCNET[SGC]
R9.rrr.rrr.rrrIBM[JP247]
R10.rrr.rrr.rrrARPANET[JS283]
D11.rrr.rrr.rrrDODIIS[GEG4]
C12.rrr.rrr.rrrATT[MH82]
C13.rrr.rrr.rrrXEROX-NET[SJ33]
C14.rrr.rrr.rrrPDN[JKR1]
R15.rrr.rrr.rrrHP-INTERNET[WU1]
C16.rrr.rrr.rrrDEC-INTERNET[BKR]
17.rrr.rrr.rrrUnassigned[NIC]
R18.rrr.rrr.rrrMIT-TEMP[JIS]
C*19.rrr.rrr.rrrFINET[RJB3]
D*20.rrr.rrr.rrrANALYTICS[BD107]
D21.rrr.rrr.rrrDDN-RVN[MLC]
D*22.rrr.rrr.rrrDSNET1[GEG4]
D23.rrr.rrr.rrrDDN-TC-NET[DH17]
24.rrr.rrr.rrrUnassigned[NIC]
R25.rrr.rrr.rrrRSRE-EXP[DBH11]
D26.rrr.rrr.rrrMILNET[TMH6]
R27.rrr.rrr.rrrNOSC-LCCN-TEMP[RH6]
R28.rrr.rrr.rrrWIDEBAND[CJW2]
D29.rrr.rrr.rrrMILX25-TEMP[TMH6]
D30.rrr.rrr.rrrARPAX25-TEMP[TMH6]
G31.rrr.rrr.rrrUCDLA-NET[CL64]
32.rrr.rrr.rrr-34.rrr.rrr.rrrUnassigned[NIC]
R35.rrr.rrr.rrrMERIT[HWB]
R36.rrr.rrr.rrrSU-NET-TEMP[VAF]
37.rrr.rrr.rrr-40.rrr.rrr.rrrUnassigned[NIC]
R41.rrr.rrr.rrrBBN-TEST-A[RH6]
R42.rrr.rrr.rrrCAN-INET[MV38]
R*43.rrr.rrr.rrrJAPAN-A[JM292]
R44.rrr.rrr.rrrAMPRNET[PK28]
45.rrr.rrr.rrrReserved[NIC]
C46.rrr.rrr.rrrBBNET[JSG1]
R47.rrr.rrr.rrrBNR[BM178]
48.rrr.rrr.rrr-126.rrr.rrr.rrrUnassigned[NIC]
*127.rrr.rrr.rrrLoopback[JBP]