IPv4 Transfers April 2021

In April 2021, the five Regional Internet Registries recorded 1,111 transfers: 4,823,424 IPv4 addresses in 778 blocks, plus 116 IPv6 blocks and 217 AS numbers. 40 transfers moved resources between two registries. Dates are the dates the registry processed the transfer.

IPv4 addresses transferred
4.8M
778 IPv4 blocks
Registry transfers
1,111
116 IPv6 / 217 ASN
Inter-RIR transfers
40
310K IPv4 addresses (6%)
Mergers and acquisitions
421
690 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, April 2021
RegistryTransfersIPv4 receivedInter-RIR inInter-RIR out
ARIN3153,077,1207,168250,880
RIPE NCC7311,621,120242,68826,112
APNIC55113,15252,73611,520
LACNIC1012,0327,68021,760

Inter-RIR Transfers April 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-
4,608
2 transfers
19K
5 transfers
2,048
1 transfers
0
ARIN
228K
10 transfers
-
17K
5 transfers
5,632
4 transfers
0
APNIC
11K
7 transfers
512
1 transfers
-00
LACNIC
3,328
3 transfers
2,048
1 transfers
16K
1 transfers
-0
AFRINIC0000-

IPv4 Transfers by Block Size

Number of transferred IPv4 blocks per prefix length.

IPv4 transfers by prefix length, April 2021
Prefix lengthAddresses per blockBlocksShare of blocksIPv4 addresses
/121,048,57610.1%1,048,576
/15131,07210.1%131,072
/1665,536314.0%2,031,616
/1732,76870.9%229,376
/1816,384162.1%262,144
/198,192435.5%352,256
/204,096617.8%249,856
/212,0487910.2%161,792
/221,02425532.8%261,120
/235129011.6%46,080
/2425619324.8%49,408
/2512810.1%128

Top Receiving Countries

  1. 1🇸🇬 Singapore60K
  2. 2🇺🇸 United States20K
  3. 3🇨🇦 Canada18K
  4. 4🇯🇵 Japan11K
  5. 5🇳🇿 New Zealand5,120
  6. 6🇨🇱 Chile4,096
  7. 7🇦🇫 Afghanistan4,096
  8. 8🇧🇷 Brazil3,584
  9. 9🇬🇧 United Kingdom3,072

Top Source Countries

  1. 1🇺🇸 United States35K
  2. 2🇨🇦 Canada24K
  3. 3🇲🇳 Mongolia16K
  4. 4🇦🇺 Australia13K
  5. 5🇭🇰 Hong Kong SAR China10K
  6. 6🇧🇩 Bangladesh5,376
  7. 7🇦🇷 Argentina4,352
  8. 8🇳🇿 New Zealand3,584
  9. 9🇨🇳 China2,048

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

Largest IPv4 Transfers April 2021