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Port 458 (appleqtc)

IANA assigns port 458 to appleqtc: apple quick time.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
appleqtc TCP apple quick time Murali Ranganathan -
appleqtc UDP apple quick time Murali Ranganathan -

Check what is listening on port 458

Linux: is anything listening on TCP 458?
sudo ss -tlnp 'sport = :458'
Linux: UDP 458
sudo ss -ulnp 'sport = :458'
Linux / macOS: which process owns the port
sudo lsof -nP -i :458
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':458 '
Windows (Command Prompt)
netstat -ano | findstr :458
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 458 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 458
From Windows
Test-NetConnection HOST -Port 458
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 458

Block port 458 in the firewall

ufw
sudo ufw deny 458/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 458 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 458 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 458' -Direction Inbound -Protocol TCP -LocalPort 458 -Action Block
ufw
sudo ufw deny 458/udp
iptables
sudo iptables -A INPUT -p udp --dport 458 -j DROP
nftables
sudo nft add rule inet filter input udp dport 458 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 458' -Direction Inbound -Protocol UDP -LocalPort 458 -Action Block

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All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.