knownports / Port ranges / 200–299
System PortsPorts 200–299
IANA lists at least one assignment on 54 of the 100 numbers from 200 to 299, 54.0%, the third-lowest share among the 9 System Port ranges on this site. The longest stretch with no assignment on any protocol runs from 225 to 241 (17 numbers). 1 number here is assigned on TCP alone and 1 on UDP alone. Of the 1 dated assignments, the earliest recorded date is July 31, 2012 (pt-tls on 271); the latest is July 31, 2012, for pt-tls on 271.
Every assigned number from 200 to 299
200–299 · 54 numbers assigned
| Port | Service | Protocols | Label | Registered |
|---|---|---|---|---|
| 200 | src | TCPUDP | IBM System Resource Controller | — |
| 201 | at-rtmp | TCPUDP | AppleTalk Routing Maintenance | — |
| 202 | at-nbp | TCPUDP | AppleTalk Name Binding | — |
| 203 | at-3 | TCPUDP | AppleTalk Unused | — |
| 204 | at-echo | TCPUDP | AppleTalk Echo | — |
| 205 | at-5 | TCPUDP | AppleTalk Unused | — |
| 206 | at-zis | TCPUDP | AppleTalk Zone Information | — |
| 207 | at-7 | TCPUDP | AppleTalk Unused | — |
| 208 | at-8 | TCPUDP | AppleTalk Unused | — |
| 209 | qmtp | TCPUDP | The Quick Mail Transfer Protocol | — |
| 210 | z39-50z39.50 | TCPUDP | ANSI Z39.50 ANSI Z39.50 | — |
| 211 | 914c-g914c/g | TCPUDP | Texas Instruments 914C/G Terminal Texas Instruments 914C/G Terminal | — |
| 212 | anet | TCPUDP | ATEXSSTR | — |
| 213 | ipx | TCPUDP | IPX | — |
| 214 | vmpwscs | TCPUDP | VM PWSCS | — |
| 215 | softpc | TCPUDP | Insignia Solutions | — |
| 216 | CAIlic | TCPUDP | Computer Associates Int'l License Server | — |
| 217 | dbase | TCPUDP | dBASE Unix | — |
| 218 | mpp | TCPUDP | Netix Message Posting Protocol | — |
| 219 | uarps | TCPUDP | Unisys ARPs | — |
| 220 | imap3 | TCPUDP | Interactive Mail Access Protocol v3 | — |
| 221 | fln-spx | TCPUDP | Berkeley rlogind with SPX auth | — |
| 222 | rsh-spx | TCPUDP | Berkeley rshd with SPX auth | — |
| 223 | cdc | TCPUDP | Certificate Distribution Center | — |
| 224 | masqdialer | TCPUDP | masqdialer | — |
| 225–241: no assignment, 17 numbers | ||||
| 242 | direct | TCPUDP | Direct | — |
| 243 | sur-meas | TCPUDP | Survey Measurement | — |
| 244 | inbusiness | TCPUDP | inbusiness | — |
| 245 | link | TCPUDP | LINK | — |
| 246 | dsp3270 | TCPUDP | Display Systems Protocol | — |
| 247 | subntbcst-tftpsubntbcst_tftp | TCPUDP | SUBNTBCST_TFTP SUBNTBCST_TFTP | — |
| 248 | bhfhs | TCPUDP | bhfhs | — |
| 256 | rap | TCPUDP | RAP | — |
| 257 | set | TCPUDP | Secure Electronic Transaction | — |
| 259 | esro-gen | TCPUDP | Efficient Short Remote Operations | — |
| 260 | openport | TCPUDP | Openport | — |
| 261 | nsiiops | TCPUDP | IIOP Name Service over TLS/SSL | — |
| 262 | arcisdms | TCPUDP | Arcisdms | — |
| 263 | hdap | TCPUDP | HDAP | — |
| 264 | bgmp | TCPUDP | BGMP | — |
| 265 | x-bone-ctl | TCPUDP | X-Bone CTL | — |
| 266 | sst | TCPUDP | SCSI on ST | — |
| 267 | td-service | TCPUDP | Tobit David Service Layer | — |
| 268 | td-replica | TCPUDP | Tobit David Replica | — |
| 269 | manet | TCPUDP | MANET Protocols | — |
| 270 | gist | UDP | Q-mode encapsulation for GIST messages | — |
| 271 | pt-tls | TCP | IETF Network Endpoint Assessment (NEA) Posture Transport Protocol over TLS (PT-TLS) | Jul 31, 2012 |
| 280 | http-mgmt | TCPUDP | http-mgmt | — |
| 281 | personal-link | TCPUDP | Personal Link | — |
| 282 | cableport-ax | TCPUDP | Cable Port A/X | — |
| 283 | rescap | TCPUDP | rescap | — |
| 284 | corerjd | TCPUDP | corerjd | — |
| 286 | fxp | TCPUDP | FXP Communication | — |
| 287 | k-block | TCPUDP | K-BLOCK | — |
| 288–299: no assignment, 12 numbers | ||||