ALLOW 0x400 L/S Tee
Allow, Deny, Allow, Deny, Allow. A calm signal through the noise — Allow 0x400.
0x400 reflects a hacking-inspired aesthetic from 400, not an actual firewall rule.

seen from United States

seen from Russia

seen from Saudi Arabia
seen from United States
seen from Germany
seen from United States
seen from Russia
seen from Türkiye
seen from United Kingdom
seen from Bosnia & Herzegovina
seen from Russia

seen from Latvia

seen from United States
seen from United States
seen from United States
seen from Germany
seen from United Kingdom
seen from France
seen from China

seen from Italy
ALLOW 0x400 L/S Tee
Allow, Deny, Allow, Deny, Allow. A calm signal through the noise — Allow 0x400.
0x400 reflects a hacking-inspired aesthetic from 400, not an actual firewall rule.
Why Your Order Might Fail Without This Input
A valid phone number may be required during checkout depending on your region.
See FAQ for details.
SQL-Inspired Error Tee
Every time I try XSS and get a SQL syntax error, I’m convinced the site is vulnerable to SQL injection—even if I can’t prove it.
Inspired by a real SQL syntax error, not an actual error message.
Binary State Oversized Tee
0101 400 1010 Wait… 400 in binary? That’s illegal. Oops—it’s just an integer sneaking in.
Inspired by the world of 0s and 1s — a fictional code-inspired design.
Pipeline Syntax–Inspired Tee
Convert 400 to an integer, then pipe it through tee.
Inspired by functional programming.
New Logo
Late announcement — on July 3, 2026, we updated the integer400 logotype.
The new version uses a monospaced slab serif typeface, replacing the previous modulated sans-serif.
This change improves how symbols render and aligns better with the hacking / coding language behind our products.
Dot Dot Slash Hoodie
../../../../ may look meaningless to many people, but it carries a familiar meaning for those who understand file paths and system navigation.
A minimal design inspired by the hidden meaning behind computer symbols.
Integer Overflow Inspired Tee
integer overflow at 400 — when a number exceeds what a system can handle. A tiny bug, a big failure.
Inspired by real programming concepts — a fictional code-inspired design, not an actual error message.