## ---- eval=FALSE--------------------------------------------------------------
#  library(iptools)
#  data(iana_assignments)
#  str(iana_assignments)
#  'data.frame':	151 obs. of  5 variables:
#   $ prefix     : chr  "49.0.0.0/8" "50.0.0.0/8" "51.0.0.0/8" "52.0.0.0/8" ...
#   $ designation: chr  "APNIC" "ARIN" "UK Government Department for Work and Pensions" ...
#   $ date       : chr  "2010-08" "2010-02" "1994-08" "1991-12" ...
#   $ whois      : chr  "whois.apnic.net" "whois.arin.net" "whois.ripe.net" "whois.arin.net" ...
#   $ status     : chr  "ALLOCATED" "ALLOCATED" "LEGACY" "LEGACY" ...
#  
#  iana_assignments_refresh()
#  [1] TRUE
#  
#  data("iana_assignments")
#  str(iana_assignments)
#  'data.frame':	256 obs. of  5 variables:
#   $ prefix     : chr  "0.0.0.0/8" "1.0.0.0/8" "2.0.0.0/8" "3.0.0.0/8" ...
#   $ designation: chr  "IANA - Local Identification" "APNIC" "RIPE NCC" ...
#   $ date       : chr  "1981-09" "2010-01" "2009-09" "1994-05" ...
#   $ whois      : chr  "" "whois.apnic.net" "whois.ripe.net" "whois.arin.net" ...
#   $ status     : chr  "RESERVED" "ALLOCATED" "ALLOCATED" "LEGACY" ...

