net/netip.Addr.As4
standard libraryThe 2563rd most-called standard-library method by production calls. Called 359 times across 38 modules; 245 of those run outside tests and generated code.
1% in production calls vs 2026-W39 (243 → 245)
- prod calls
- 245
- non-test, non-generated
- all calls
- 359
- total callsites
- modules
- 38
- distinct callers
- in loop
- 14%
- of prod calls
- in tests
- 32%
- 114 calls
- resolved
- 100%
- to a known target
resolution mix
How each call resolves
How each call was attributed. Only resolved kinds, where the target function is known, count toward the ranking. Interface dispatch and unresolved receivers are reported separately and never guessed. Read the taxonomy →
- Concrete method100%A method on a value whose type is known exactly.
who calls this
Notable callers
Production calls into Addr.As4 from notable Go projects. Open one on the map to see what else it hammers.
- Tailscale 31 13%
- Cilium 30 12%
- Docker 4 2%
- Istio 4 2%
- Go (golang.org/x) 1 <1%
where it's called
Callsites in the wild
12 representative callsites of 359, prioritizing in-loop and non-test usage. We link to source, never display it.
- in loop
- in loop
- in loop
-
passteque/gluetun @v0.0.0-20260926220802-ded7fd059ca0
in loop -
sagernet/sing-tun @v0.9.6
in loop -
sagernet/tailscale @v1.102.1-sing-box-1.14-mod.5
in loop - in loop
-
slackhq/nebula @v1.11.2
in loop -
golang.zx2c4.com/wireguard @v0.0.0-20260522210424-ecfc5a8d5446
device/sticky_linux.go:175
in loop -
istio.io/istio @v0.0.0-20260928115056-32ddacd7a1cb
security/pkg/pki/util/san.go:83
in loop - in loop
-
tailscale.com @v1.102.5
cmd/sniproxy/server.go:236
in loop
top callers
The modules that reach for it
The modules that call Addr.As4 most in this snapshot.
- tailscale.com8123%
- github.com/tailscale/tailscale7220%
- github.com/cilium/cilium349%
- github.com/slackhq/nebula308%
- github.com/sagernet/tailscale278%
siblings
More from net/netip
The other most-called members in this package. See all →