Point Codes

International Signaling Point Code

14-bits total

3bits - Zone Identification

8bits - Area/Network Identification

3bits - Signaling Point Identification

US Network Point Code

24-bits Total

8-bits - Network Identification

8-bits - Network Cluster

8-bits - Cluster Member

ITU - Point codes range from 0-0-0 to 7-255-7.

ANSI - Point codes range from 0-0-0 to 255-255-255.

Adjacent Point Code (APC) - Destination Point Code (DPC)

Point code types

SEP - Indicates that all point codes in this cluster use the same routing data.

STP - Indicates when a signaling point is used as a transfer point.

STEP - Indicates when a signaling point is used as a transfer point and an end point.