[root]# ./nmap -V

Nmap version 6.41SVN ( http://nmap.org )
Platform: i386-unknown-freebsd9.2
Compiled with: nmap-liblua-5.2.2 openssl-0.9.8y nmap-libpcre-7.6 libpcap-1.4.0 nmap-libdnet-1.12 ipv6
Compiled without:
Available nsock engines: kqueue poll select
[root]# ./nmap -P0 -sV -p 53 {a..m}.root-servers.net

Starting Nmap 6.41SVN ( http://nmap.org ) at 2013-12-04 14:31 EST
Nmap scan report for a.root-servers.net (198.41.0.4)
Host is up (0.089s latency).
PORT   STATE SERVICE    VERSION
53/tcp open  tcpwrapped

Nmap scan report for b.root-servers.net (192.228.79.201)
Host is up (0.16s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 4.8.1

Nmap scan report for c.root-servers.net (192.33.4.12)
Host is up (0.0055s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND c-root

Nmap scan report for d.root-servers.net (199.7.91.13)
Host is up (0.096s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.8

Nmap scan report for e.root-servers.net (192.203.230.10)
Host is up (0.0026s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain

Nmap scan report for f.root-servers.net (192.5.5.241)
Host is up (0.17s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.9.3

Nmap scan report for g.root-servers.net (192.112.36.4)
Host is up (0.0082s latency).
rDNS record for 192.112.36.4: G.ROOT-SERVERS.NET
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.X

Nmap scan report for h.root-servers.net (128.63.2.53)
Host is up (0.10s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  NLnet Labs NSD 4.0.0

Nmap scan report for i.root-servers.net (192.36.148.17)
Host is up (0.0026s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain

Nmap scan report for j.root-servers.net (192.58.128.30)
Host is up (0.26s latency).
PORT   STATE SERVICE    VERSION
53/tcp open  tcpwrapped

Nmap scan report for k.root-servers.net (193.0.14.129)
Host is up (0.0091s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  NLnet Labs NSD 3.2.14

Nmap scan report for l.root-servers.net (199.7.83.42)
Host is up (0.065s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  NLnet Labs NSD 3.2.15

Nmap scan report for m.root-servers.net (202.12.27.33)
Host is up (0.26s latency).
rDNS record for 202.12.27.33: M.ROOT-SERVERS.NET
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.9.3-P2

Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 13 IP addresses (13 hosts up) scanned in 19.55 seconds




===================================================================================================
JOBO-3245:~ johnbond$ nmap -V

Nmap version 6.40 ( http://nmap.org )
Platform: x86_64-apple-darwin13.0.2
Compiled with: liblua-5.2.2 openssl-0.9.8y nmap-libpcre-7.6 libpcap-1.3.0 nmap-libdnet-1.12 ipv6
Compiled without:
Available nsock engines: kqueue poll select
JOBO-3245:~ johnbond$ sudo nmap -P0 -sV -p 53 {a..m}.root-servers.net

Starting Nmap 6.40 ( http://nmap.org ) at 2013-12-04 20:30 CET
Nmap scan report for a.root-servers.net (198.41.0.4)
Host is up (0.038s latency).
PORT   STATE SERVICE    VERSION
53/tcp open  tcpwrapped

Nmap scan report for b.root-servers.net (192.228.79.201)
Host is up (0.18s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 4.8.1

Nmap scan report for c.root-servers.net (192.33.4.12)
Host is up (0.038s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND c-root

Nmap scan report for d.root-servers.net (199.7.91.13)
Host is up (0.038s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND BIND 9.8

Nmap scan report for e.root-servers.net (192.203.230.10)
Host is up (0.032s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain

Nmap scan report for f.root-servers.net (192.5.5.241)
Host is up (0.034s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.9.3

Nmap scan report for g.root-servers.net (192.112.36.4)
Host is up (0.046s latency).
rDNS record for 192.112.36.4: G.ROOT-SERVERS.NET
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.X

Nmap scan report for h.root-servers.net (128.63.2.53)
Host is up (0.12s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND NSD 4.0.0

Nmap scan report for i.root-servers.net (192.36.148.17)
Host is up (0.026s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain

Nmap scan report for j.root-servers.net (192.58.128.30)
Host is up (0.041s latency).
PORT   STATE SERVICE    VERSION
53/tcp open  tcpwrapped

Nmap scan report for k.root-servers.net (193.0.14.129)
Host is up (0.15s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND NSD 3.2.14

Nmap scan report for l.root-servers.net (199.7.83.42)
Host is up (0.021s latency).
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND NSD 3.2.15

Nmap scan report for m.root-servers.net (202.12.27.33)
Host is up (0.033s latency).
rDNS record for 202.12.27.33: M.ROOT-SERVERS.NET
PORT   STATE SERVICE VERSION
53/tcp open  domain  ISC BIND 9.9.3-P2

Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 13 IP addresses (13 hosts up) scanned in 19.10 seconds