Port 3333Network Caller ID
Port 3333 is commonly used for the Network Caller ID (NCID) server service, an open-source system designed to distribute caller identification info across a network. It enables sharing caller ID information from a telephony input (like a modem or VoIP gateway) to various connected devices, such as PCs or media centers, enhancing call screening and logging across networked systems..
- transport
- tcp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 10,132
single transport
payload readable on path
used by convention
caution
rank 454 of 993 · top 46%
Technical Details
what runs on :3333Network Caller ID (NCID) is an open-source client-server architecture designed to capture and distribute caller identification information across a local network. The NCID server typically listens on TCP port 3333, receiving incoming call data from modems or telephony gateways capable of forwarding caller ID signals. Once captured, this information is disseminated to multiple NCID clients connected over the network.
The server parses the caller ID data, which may include the caller's phone number, name, and call timestamp. Clients display this information to end users in real time, facilitating network-wide call monitoring. The NCID protocol is plaintext-based and lightweight, making implementation straightforward for various platforms including Linux, Windows, macOS, and embedded devices.
Integration with other software components such as media centers or home automation systems is typical; for example, to pause media playback on incoming calls or log call histories automatically. Since communication is unencrypted by default, deployments are most secure within trusted, private networks.
Security Information
exposure of :3333risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
network services averages 3.9 across 604 ports — this one sits 0.1 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
unofficial
used by convention, not registered — what answers here varies by deployment
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
Common Vulnerabilities:
- Lack of encryption exposes caller ID data to eavesdropping if operated on untrusted networks.
- Unauthorized access could allow an attacker to inject false caller ID information or harvest call metadata.
- Weak access controls or outdated server software may be susceptible to DoS attacks or exploitation of implementation flaws.
Common Mitigations:
- Deploy NCID servers strictly within trusted and secured private networks.
- Implement network segmentation or firewall rules restricting access to port 3333.
- Consider tunneling NCID traffic through encrypted channels (such as SSH or VPN).
- Regularly update NCID software to address security vulnerabilities.
- Monitor logs and network activity to detect unauthorized attempts to connect to the server.
Related Ports
the 8 most looked-up other ports in network services — 604 ports carry that label.
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|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :6543 | Jetnet | UDP | Network Services | caution | 65.3k |
| :5938 | TeamViewer | TCPUDP | Remote Access | caution | 65.0k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3233 | WhiskerControl Protocol | TCPUDP | Network Services | caution | 61.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Tatsoft Default HTTP Proxy | TCP | Web Services | caution | 46.8k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted