IPv4 Transfers November 2021

In November 2021, the five Regional Internet Registries recorded 1,672 transfers: 31,860,608 IPv4 addresses in 1,289 blocks, plus 231 IPv6 blocks and 152 AS numbers. 78 transfers moved resources between two registries. Dates are the dates the registry processed the transfer.

IPv4 addresses transferred
31.9M
1,289 IPv4 blocks
Registry transfers
1,672
231 IPv6 / 152 ASN
Inter-RIR transfers
78
255K IPv4 addresses (1%)
Mergers and acquisitions
322
1,350 market transfers

Transfer Volume by RIR

Transfers counted at the receiving registry. Inter-RIR columns show IPv4 that entered or left the region.

Transfers per Regional Internet Registry, November 2021
RegistryTransfersIPv4 receivedInter-RIR inInter-RIR out
ARIN30029,429,76042,752168,704
APNIC611,251,32866,04819,456
RIPE NCC1,2911,154,176146,17651,200
AFRINIC1520,992--
LACNIC54,352-15,616

Inter-RIR Transfers November 2021

IPv4 addresses moved from one registry to another. All inter-RIR transfers

IPv4 addresses transferred between Regional Internet Registries
From ↓ / To →RIPE NCCARINAPNICLACNICAFRINIC
RIPE NCC-
33K
2 transfers
18K
3 transfers
00
ARIN
121K
32 transfers
-
48K
10 transfers
00
APNIC
16K
18 transfers
3,584
7 transfers
-00
LACNIC
9,216
2 transfers
6,400
4 transfers
0-0
AFRINIC0000-

IPv4 Transfers by Block Size

Number of transferred IPv4 blocks per prefix length.

IPv4 transfers by prefix length, November 2021
Prefix lengthAddresses per blockBlocksShare of blocksIPv4 addresses
/98,388,60810.1%8,388,608
/104,194,30430.2%12,582,912
/112,097,15220.2%4,194,304
/13524,28830.2%1,572,864
/14262,14450.4%1,310,720
/15131,07240.3%524,288
/1665,536201.6%1,310,720
/1732,768100.8%327,680
/1816,384141.1%229,376
/198,192493.8%401,408
/204,096493.8%200,704
/212,048755.8%153,600
/221,02444434.4%454,656
/2351220616.0%105,472
/2425640331.3%103,168
/2512810.1%128

Top Receiving Countries

  1. 1🇸🇬 Singapore121K
  2. 2🇵🇭 Philippines40K
  3. 3🇨🇦 Canada39K
  4. 4🇺🇸 United States21K
  5. 5🇳🇱 Netherlands8,192
  6. 6🇿🇦 South Africa4,096
  7. 7🇭🇰 Hong Kong SAR China3,072
  8. 8🇨🇳 China2,048
  9. 9🇯🇵 Japan1,024

Top Source Countries

  1. 1🇦🇺 Australia959K
  2. 2🇨🇳 China68K
  3. 3🇨🇦 Canada52K
  4. 4🇰🇾 Cayman Islands33K
  5. 5🇦🇷 Argentina16K
  6. 6🇺🇸 United States14K
  7. 7🇭🇰 Hong Kong SAR China10K
  8. 8🇬🇭 Ghana4,096
  9. 9🇮🇳 India3,840

IPv4 transferred across country borders in November 2021. Registry logs before mid-2025 do not carry a country for every transfer, so this ranking undercounts some regions.

Largest IPv4 Transfers November 2021