diff --git a/README.md b/README.md
index 1be46fa..1ce31fe 100644
--- a/README.md
+++ b/README.md
@@ -96,6 +96,12 @@ isIPFS.ipnsSubdomain('http://bafybeiabc2xofh6tdi6vutusorpumwcikw3hf3st4ecjugo6j5
 isIPFS.ipnsSubdomain('http://bafybeiabc2xofh6tdi6vutusorpumwcikw3hf3st4ecjugo6j52f6xwc6q.dweb.link') // false
 isIPFS.ipnsSubdomain('http://QmcNioXSC1bfJj1dcFErhUfyjFzoX2HodkRccsFFVJJvg8.ipns.dweb.link') // false
 isIPFS.ipnsSubdomain('http://foo-bar.ipns.dweb.link') // false (not a PeerID)
+
+isIPFS.multiaddr('/ip4/127.0.0.1/udp/1234') // true
+isIPFS.multiaddr('/ip4/127.0.0.1/udp/1234/http') // true
+isIPFS.multiaddr('/ip6/::1/udp/1234') // true
+isIPFS.multiaddr('ip6/::1/udp/1234') // false
+isIPFS.multiaddr('/yoloinvalid/::1/udp/1234') // false
 ```
 
 # API
@@ -115,7 +121,7 @@ Returns `true` if the provided string is a valid `multihash` or `false` otherwis
 
 ### `isIPFS.cid(hash)`
 
-Returns `true` if the provided string is a valid `CID` or `false` otherwise.
+Returns `true` if the provided string or [`CID`](/~https://github.com/ipld/js-cid) is a valid [CID](https://docs.ipfs.io/guides/concepts/cid/) or `false` otherwise.
 
 ### `isIPFS.base32cid(hash)`
 
@@ -172,6 +178,11 @@ Returns `true` if the provided string includes a valid IPFS subdomain or `false`
 
 Returns `true` if the provided string includes a valid IPNS subdomain or `false` otherwise.
 
+## Multiaddrs
+
+### `isIPFS.multiaddr(addr)`
+
+Returns `true` if the provided `string`, [`Multiaddr`](/~https://github.com/multiformats/js-multiaddr) or `Buffer` includes a valid [multiaddr](https://multiformats.io/multiaddr/) or `false` otherwise.
 
 # License
 
diff --git a/package.json b/package.json
index f9b08bd..3f0e957 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
   "dependencies": {
     "bs58": "4.0.1",
     "cids": "~0.5.6",
+    "multiaddr": "6.0.4",
     "multibase": "~0.6.0",
     "multihashes": "~0.4.13"
   },
diff --git a/src/index.js b/src/index.js
index 58e9f67..08de930 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,6 +3,7 @@
 const base58 = require('bs58')
 const multihash = require('multihashes')
 const multibase = require('multibase')
+const Multiaddr = require('multiaddr')
 const CID = require('cids')
 
 const urlPattern = /^https?:\/\/[^/]+\/(ip(f|n)s)\/((\w+).*)/
@@ -42,6 +43,20 @@ function isCID (hash) {
   }
 }
 
+function isMultiaddr (input) {
+  if (!input) return false
+  if (isString(input) || input instanceof Buffer) {
+    try {
+      new Multiaddr(input) // eslint-disable-line no-new
+      return true
+    } catch (e) {
+      return false
+    }
+  }
+  if (Multiaddr.isMultiaddr(input)) return true
+  return false
+}
+
 function isIpfs (input, pattern, protocolMatch = defaultProtocolMatch, hashMatch = defaultHashMath) {
   const formatted = convertToString(input)
   if (!formatted) {
@@ -116,6 +131,7 @@ const ipnsSubdomain = (url) => isIpns(url, fqdnPattern, fqdnProtocolMatch, fqdnH
 
 module.exports = {
   multihash: isMultihash,
+  multiaddr: isMultiaddr,
   cid: isCID,
   base32cid: (cid) => (isMultibase(cid) === 'base32' && isCID(cid)),
   ipfsSubdomain: ipfsSubdomain,
diff --git a/test/test-cid.spec.js b/test/test-cid.spec.js
index 8243a48..065e4d7 100644
--- a/test/test-cid.spec.js
+++ b/test/test-cid.spec.js
@@ -4,8 +4,16 @@
 const base58 = require('bs58')
 const expect = require('chai').expect
 const isIPFS = require('../src/index')
+const CID = require('cids')
 
 describe('ipfs cid', () => {
+  it('isIPFS.cid should match a valid CID instance', (done) => {
+    const cid = new CID('QmYjtig7VJQ6XsnUjqqJvj7QaMcCAwtrgNdahSiFofrE7o')
+    const actual = isIPFS.cid(cid)
+    expect(actual).to.equal(true)
+    done()
+  })
+
   it('isIPFS.cid should match a valid CIDv0 (multihash)', (done) => {
     const actual = isIPFS.cid('QmYjtig7VJQ6XsnUjqqJvj7QaMcCAwtrgNdahSiFofrE7o')
     expect(actual).to.equal(true)
diff --git a/test/test-multiaddr.spec.js b/test/test-multiaddr.spec.js
new file mode 100644
index 0000000..a388b25
--- /dev/null
+++ b/test/test-multiaddr.spec.js
@@ -0,0 +1,64 @@
+/* eslint-env mocha */
+'use strict'
+
+const expect = require('chai').expect
+const Multiaddr = require('multiaddr')
+const isIPFS = require('../src/index')
+
+describe('ipfs multiaddr', () => {
+  it('isIPFS.multiaddr should match a string with valid ip4 multiaddr', (done) => {
+    const actual = isIPFS.multiaddr('/ip4/127.0.0.1/udp/1234/http')
+    expect(actual).to.equal(true)
+    done()
+  })
+
+  it('isIPFS.multiaddr should match a string with valid ip6 multiaddr', (done) => {
+    const actual = isIPFS.multiaddr('/ip6/::1/udp/1234/http')
+    expect(actual).to.equal(true)
+    done()
+  })
+
+  it('isIPFS.multiaddr should match a valid Multiaddr instance', (done) => {
+    const ma = new Multiaddr('/ip6/::1/udp/1234/http')
+    const actual = isIPFS.multiaddr(ma)
+    expect(actual).to.equal(true)
+    done()
+  })
+
+  it('isIPFS.multiaddr should match a Buffer with multiaddr', (done) => {
+    const ma = new Multiaddr('/ip6/::1/udp/1234/http')
+    const actual = isIPFS.multiaddr(Buffer.from(ma.buffer))
+    expect(actual).to.equal(true)
+    done()
+  })
+
+  it('isIPFS.multiaddr should not match random Buffer', (done) => {
+    const actual = isIPFS.multiaddr(Buffer.from('randombuffer'))
+    expect(actual).to.equal(false)
+    done()
+  })
+
+  it('isIPFS.multiaddr should not match an invalid multiaddr (no initial slash)', (done) => {
+    const actual = isIPFS.multiaddr('ip4/127.0.0.1/udp/1234/http')
+    expect(actual).to.equal(false)
+    done()
+  })
+
+  it('isIPFS.multiaddr should not match an invalid multiaddr (unknown namespace)', (done) => {
+    const actual = isIPFS.multiaddr('/yoloinvalid/127.0.0.1/udp/1234/http')
+    expect(actual).to.equal(false)
+    done()
+  })
+
+  it('isIPFS.multiaddr should not match an invalid multiaddr', (done) => {
+    const actual = isIPFS.multiaddr('noop')
+    expect(actual).to.equal(false)
+    done()
+  })
+
+  it('isIPFS.multiaddr should not match an invalid multiaddr data type', (done) => {
+    const actual = isIPFS.multiaddr(4)
+    expect(actual).to.equal(false)
+    done()
+  })
+})